Mackenzie McDonald recorded the biggest moment of his career on Friday at the Delray Beach Open by VITACOST.com, holding off a determined Juan Martin del Potro in their quarter-final clash to defeat the top seed 6-4, 3-6, 7-6(5).

The win gave the American his first ATP Tour semi-final berth and first victory over a Top 5 player. Currently No. 84 in the ATP Rankings, McDonald is guaranteed to surpass his career-high of No. 76 when the newest standings are released on Monday.

The match began with comfortable service holds from both men, but Del Potro’s movement appeared hampered by the middle of the first set. Walking gingerly between points and letting mid-pace balls pass him by for winners, the American won 10 consecutive points to take the early advantage.

With the crowd chanting “Delpo”, the Argentine battled valiantly in the second set. He increased the pace on his serve and gambled on his forehand in a bid to shorten the points. McDonald blinked first in the second set and floated a drop shot into the net down break point at 2-3. The slight advantage was all the top seed needed to bring the match to a decider.

Neither player dropped serve in the final set to force a tie-break. McDonald grabbed a mini-break advantage to lead 5/2 after a pair of forehand errors from del Potro. The American missed his first two match point opportunities, but struck a forehand volley winner at 6/5 and threw his racquet to the ground in celebration.

Delray Beach is guaranteed to have a first-time ATP Tour finalist when McDonald next faces Radu Albot, who continued his top form with a comeback 1-6, 6-3, 7-6(5) upset over fourth seed Steve Johnson of the United States. The 29-year-old fought back from 4/5 in the third-set tie-break and jubilantly celebrated as he advanced in two hours and seven minutes.

“I was losing the whole time and was definitely not in control of the match, but was able to serve better, return better and get the win,” said Albot. “This week is the best achievement I’ve had on the ATP Tour, so hopefully I can go one step further and make the final.”

Two of Albot’s three ATP Tour semi-finals have come this month. The Moldovan also reached the last four two weeks ago at the Open Sud de France.

#NextGenATP Canadian Felix Auger-Aliassime continued to create new milestones in his young career on Friday at the Rio Open presented by Claro. Two days after reaching his first 500-level quarter-final, the wild card defeated Spaniard Jaume Munar 6-4, 6-3 for his first ATP Tour semi-final in Rio de Janeiro.

“This is what I work for every day. It’s what I get up for every morning,” said Auger-Aliassime. “As soon as I walked on court, I felt the energy from the crowd and felt like I couldn’t get tired. The tournament isn’t over yet, but this feels great.”

The Canadian was undaunted by the occasion on Quadra Guga Kuerten and sprinted to a 4-1 lead in the first set. Munar began to sink his teeth into the lengthy baseline rallies, but the deficit proved too much and Auger-Aliassime grabbed the early advantage.

It appeared the 18-year-old would coast to victory after breaking Munar in the opening game of the second set, but the Spaniard hung tough and earned the break back at 2-3 with the help of a net cord. Munar reached 40/0 on his serve in the next game, but Auger-Aliassime found a new gear and dominated the remainder of the contest. A forehand winner on his first match point ended play after one hour and 38 minutes.

Auger-Aliassime finished with 32 winners and 34 errors, compared to seven winners and 18 errors for Munar. The wild card’s baseline aggression allowed to him accumulate 10 break points and convert on four of them.

The World No. 104 in the ATP Rankings started the week by recording his first Top 15 win over second seed Fabio Fognini of Italy. Auger-Aliassime is guaranteed to make his Top 100 debut on Monday and land at least inside the Top 80. He will crack the Top 50 if he can win the title on Sunday.

Awaiting Auger-Aliassime in the next round is the winner of Pablo Cuevas of Uruguay and Albert Ramos-Vinolas of Spain.

Laslo Djere of Serbia continued to back up his first-round upset over top seed and 2017 champion Dominic Thiem by defeating #NextGenATP Norwegian Casper Ruud 6-4, 7-5. Djere trailed 2-5, 0/30 against the qualifier in the second set, but rallied to win 20 of the final 28 points. The 23-year-old will look to reach his first ATP Tour final on Saturday.

Standing between him and that achievement is Aljaz Bedene of Slovenia, who fought back to defeat qualifier Hugo Dellien of Bolivia 4-6, 6-2, 6-3. Little separated the two players, who saw 10 of their 27 games reach deuce, but Bedene controlled the tempo in the latter stages to prevail in two hours and 23 minutes.

Wild cards Thomaz Bellucci and Rogerio Dutra Silva continued their top form on Friday at the Rio Open presented by Claro, The Brazilians hung tough to reach the final in Rio de Janeiro with a 6-4, 7-6(3) victory over Andres Molteni and Roman Jebavy.

This is the first 500-level final for Bellucci or Dutra Silva. Bellucci seeks his first ATP Tour doubles title since winning the MercedesCup (when it was a clay-court event) in July 2013 (w/Bagnis), while Dutra Silva’s lone doubles title came two years ago at the Brasil Open (w/Sa).

They’ll play Maximo Gonzalez and Nicolas Jarry for the title after the pair defeated second seeds Juan Sebastian Cabal and Robert Farah 3-6, 7-5, 10-7. Gonzalez has won five ATP Tour doubles titles, including last week at the Argentina Open (w/Zeballos), while Jarry prevailed last year in Quito (w/Podlipnik-Castillo).

At the Open 13 Provence in Marseille, third seeds Ben McLachlan and Matwe Middelkoop outlasted Jurgen Melzer and Philipp Oswald 3-6, 7-5, 10-7 to reach the final. They’ll play the winner of the other semi-final featuring Jeremy Chardy and Fabrice Martin against Sander Arends and Tristan-Samuel Weissborn.

Novak Djokovic wouldn’t have returned to the peak of the ATP Rankings last season without his all-time great backhand, but more importantly, without the support of his wife, Jelena.

Djokovic, who received the Laureus World Sportsman of the Year Award earlier this week, spoke with CNN on how big of a role Jelena has played in his comeback, which included his historic rise from No. 22 to No. 1 in the ATP Rankings and becoming the first player to achieve the Career Golden Masters by winning all nine ATP Masters 1000 events.

“Her support was crucial in the times when I was facing adversity and had obstacles that seemed at times too challenging. Without her support, it would be very difficult for me to play competitive tennis at such a high level,” he said.

Djokovic missed the final five months of the 2017 season and underwent elbow surgery shortly after losing in the fourth round of the 2018 Australian Open. “Twelve months ago, I was on the surgery table. I did question everything about my career, how I wanted to go about my life in the future,” Djokovic said.

The decision to do surgery, Jelena said, went against her husband’s “core values” and he contemplated quitting the sport. “It was really huge. It was like he buried one part of him with that decision. He said, ‘I’m done. I’m not playing tennis anymore. I lost this. I’m not having fun anymore. This is it,’” she said.

Fortunately for tennis fans, the Serbian has more than just kept playing tennis. His title at the Australian Open last month marked his 15^th Grand Slam, one more than his boyhood hero, American Pete Sampras.

“I think the transformational journey really started three years ago at [Roland Garros] 2016, when I held all four Slams at the same time. [It’s] the ultimate achievement in tennis, but I didn’t feel fulfilled, I just felt like something was missing,” Djokovic said.

Click Here To Watch The Full CNN Interview

Second seed John Isner remained untouchable on serve on Friday at the Delray Beach Open by VITACOST.com. The American fired 24 aces and stormed into the semi-finals with a 7-6(2), 6-4 victory over eighth seed Adrian Mannarino of France.

“I thought Adrian was playing well today. Those three break points I saved in the first set felt like set points,” said Isner. “I was able to get the one break in the second set and sometimes that’s all you need.”

Isner saved three break points at 3-4 in the first set and secured the lone break of the match at 2-2 in the second set to wrap up the win in one hour and 33 minutes. He improves his FedEx ATP Head2Head against Mannarino to 7-1 and has won their past six matches.

The American has held in all 31 of his service games this week and hasn’t dropped a set. He’s into his fourth Delray Beach semi-final (2012-2014, 2019), but is looking for his final. Should Isner take the title, it would mark the 400th match win of his career.

Next up for the American is British qualifier Daniel Evans, who continued his top form with a 6-4, 6-4 win over sixth seed Andreas Seppi. Evans raced to a 5-1 lead in the first set and maintained control of the baseline rallies to move into his first ATP Tour semi-final since the 2017 Sydney International.

“I played pretty well today and thought it was a clean match. My game style matches up well to his,” said Evans. “Playing in the qualifying this week definitely helped me. I’m not there yet, though, and there’s still plenty of work to do.”

The World No. 148 has jumped nearly 45 spots in the ATP Rankings since the start of 2019. He opened this season by qualifying for the Australian Open and advancing to the second round, then finished runner-up earlier this month at the ATP Challenger Tour event in Quimper. The Brit recorded the first big upset of the week in Delray Beach by defeating third seed Frances Tiafoe in the opening round.

China will host a new ATP Tour event in September, with the city of Zhuhai serving as host for the Zhuhai Open from 23-29 September.

The 250-level event, offering US $1,000,000 in prize money, will be held at the custom-designed, state-of-the-art Hengqin Tennis Center. It will be played the week before the China Open in Beijing and joins the Chengdu Open as the opening stops of the three-week Asian swing held in September and October.

“On behalf of the ATP, we welcome the city of Zhuhai to the ATP Tour in 2019,” said Alison Lee, ATP International Executive Vice President. “I am sure the players will enjoy their time in the city and playing at the magnificent Hengqin Tennis Center.”

Zhuhai has held an ATP Challenger Tour event in March for the past three years at the Hengqin Tennis Center. The Challenger began as a $50,000 event in 2016 and was upgraded last year to a $75,000 event.

Zhuhai is located on the southern coast of China, at the heart of the Greater Bay Area and near Hong Kong and Macau. It has been selected as “China’s Most Livable City” by the Chinese Academy of Social Services since 2015. The Hong Kong-Macau-Zhuhai bridge was opened in October 2018, making Zhuhai directly and easily accessible by road from Hong Kong.

“With the opening of the new Hong Kong-Zhuhai-Macau Bridge, it is easier for players traveling from Hong Kong to Zhuhau,” said Tournament Director Leon Sun. “As the only ATP Tour tournament in Southern China, we warmly welcome all the fans, including from Hong Kong and Macau, to enjoy great tennis in this new and modern venue. We look forward to seeing you there in September.”

“Huafa Sports is excited to present a first-class ATP Tour event, providing high-quality services to players, officials, sponsors and tennis fans locally and afar. A grand and colourful tennis carnival will be staged in Zhuhai in September,” said Peter LV, Executive Director of Huafa Sports, the tournament promoter and operator. “Since 2015, Zhuhai has started its endeavour in promoting tennis both at the professional and amateur level…and has garnered a stellar reputation in event operation and management, with strong support from the local government and local tournament promoter Huafa Group. The Zhuhai Open will become a new boost for local tennis development and undoubtedly a highlight on the ATP Tour.”