They are the biggest tournaments in our sport, where participation is mandatory, entry is reserved for the world’s best and success is rewarded with fame and a rich haul of points and prize money.

Claiming a title at each level – Grand Slam, Barclays ATP World Tour Finals and ATP World Tour Masters 1000 – has its unique challenges. But the tournaments are all stages upon which legends are made, where careers are defined and where victory earns players universal respect from peers, fans and media. Not surprisingly, the players with the best ‘Big Titles’ records are regarded as the giants of the game.

So which players have the most ‘Big Titles’ and best strike rates at these elite events?

Roger Federer leads the field with 47 Big Titles, including 17 Grand Slams and six Barclays ATP World Tour Finals – both records. He is third all-time with 24 Masters 1000 crowns, including seven in Cincinnati. The Swiss has played 203 tournaments at this level, averaging one title for each 4.3 events played.

Novak Djokovic, who on Sunday won a record-setting 29^th ATP World Tour Masters 1000 title in Madrid, is just two trophies behind Federer with 45 Big Titles. A five-time Barclays ATP World Tour Finals champion, Djokovic has by the far the best conversion rate of any player, past or present, winning one Big Title for every 3.2 events played at this level.

Rafael Nadal also boasts an exceptional strike rate, winning one Big Title for every 3.5 appearances. He is joint second all-time for most Grand Slam titles won with 14, and outright second all-time for most Masters 1000 titles won with 28 crowns, just one behind Djokovic’s record haul.

Andy Murray, who throughout his career has competed against the suffocating dominance of Federer, Nadal and Djokovic, has won 13 Big Titles. The Scot has 11 Masters 1000s (the same amount as all-time great Pete Sampras) and two majors. Murray wins one Big Title for every 10.4 tournaments played.

Since the ATP World Tour Masters 1000 series launched in 1990, Sampras has been the only player to rival the Big Titles strike rates of Djokovic, Nadal and Federer. A winner of 14 Grand Slam titles and five Barclays ATP World Tour Finals, the six-time year-end World No. 1 averaged one Big Title per 4.9 tournaments played.

One other player whose strike rate is in singles figures is Andre Agassi, who at one time was the record Masters 1000 title holder with 17 titles, including six Miami crowns. Agassi also won eight majors and one season finale. His 26 Big Titles from 164 tournaments played came at an average of one title per 6.3 events played.

Those historical averages put in perspective the utter dominance Djokovic has displayed in his past 21 outings at this level dating back to the 2014 BNP Paribas Masters in Paris. During that time the Serb has won one Big Title for every 1.23 events he’s played, going 4 of 5 at Grand Slams, 11 of 14 at Masters 1000s and 2 for 2 at Barclays ATP World Tour Finals.

Current and Former Champions (Records Since 1990)

Current Top 10

Although it ended sooner than both would have liked, Andy Murray’s partnership with former coach Amelie Mauresmo was a success, the World No. 3 said on Tuesday.

His two-year working relationship with the former WTA World No. 1 helped Murray’s self-belief and tactical game. During their time together, Murray won seven tour-level titles and jumped six spots in the Emirates ATP Rankings.

“When she first came into the team, I was really struggling. I was not doing well. My confidence was low and I was going the wrong direction,” Murray said during his pre-tournament press conference at the Internazionali BNL d’Italia in Rome. “When she came on board, my results actually really picked up. For me, the time we spent together was positive.”

Murray announced he and Mauresmo were splitting on Monday, a day after the Brit lost in three sets to World No. 1 Novak Djokovic during the Mutua Madrid Open final. He and Mauresmo started working together on 8 June 2014. At the time, Murray was struggling with confidence and was trying to make his way into top form again after undergoing back surgery in September 2013. Murray was ranked No. 8 in the Emirates ATP Rankings and would see his ranking fall to No. 11 later in 2014.

Murray was without a title in 2014 before Mauresmo joined but he’d win three titles later that year. In 2015, Murray won four tour-level titles, including two ATP World Tour Masters 1000 titles and his first clay-court championships. He also made the final at the Australian Open and at two other Masters 1000 events.

In 2016, Murray’s success continued. He again reached the final in Australia and nearly repeated in Madrid on Sunday. “I think the results that we had were good,” Murray said.

Mauresmo gave birth to a baby boy in August 2015, and after Murray went 1-2 at the Barclays ATP World Tour Finals last year, there had been talk their working relationship would end. But the two stuck together, and the 28 year old said the decision gave his 2016 a needed boost.

“I think it gave both of us a lift, really. I think when I showed the confidence in her, she was really passionate and pumped and really wanted to make it work and me the same when she also stuck by me,” Murray said. “It was like, OK, we’re going to show everyone we’re a strong team… I think it was maybe my best Australian Open. I played extremely well there and came back well from how I finished [2015].”

The two had discussed trying to continue through Wimbledon but ultimately decided it was best to split now. Between the Australian Open and this week’s Internazionali BNL d’Italia, Murray said they’ve spent only 10 days together. “You simply need more time than that to make an impact and make a difference, in my opinion, and Amelie’s, as well,” he said.

The 11-time Masters 1000 champion said he’ll talk about his next move with his team in the upcoming weeks. Murray begins his Rome campaign against qualifier Mikhail Kukushkin of Kazahkstan on Wednesday. Kukushkin, No. 87 in the Emirates ATP Rankings, beat Next Generation star Borna Coric in three sets in the first round. Murray leads their FedEx ATP Head2Head rivalry 3-0.

The Scot’s best finish in the Italian capital was a semi-final run in 2011. During the past two seasons, Murray has lost only three times on clay (24-3).

Dominic Thiem, the No. 13 seed and a winner of two ATP World Tour titles this season, will play Joao Sousa in the second round of the Internazionali BNL d’Italia after Thiem defeated Alexandr Dolgopolov 6-3, 3-6, 6-4 on Monday. It was his 30th match win of the year. In 2015 he didn’t achieve the mark until the US Open first round in late August.

“I had a very good start to the season, and now its getting a little bit tougher,” said Thiem. “I didn’t play well over the past two weeks, but I had a good win today. I hope it’s a little bit of a turnaround again.”

Sousa, who is at a career-high No. 30 in the Emirates ATP Rankings, got the better of wild card Lorenzo Sonego 6-7(5), 6-3, 7-5.

Thomaz Bellucci broke a three-match losing streak against Gael Monfils, the No. 14 seed, after a 6-3, 7-6(2) win. The World No. 37, who is making his sixth appearance in Rome, is 6-12 on the season and now faces Pablo Cuevas or Nicolas Mahut. Monfils’ best result at the tournament came on his 2006 debut when he advanced to the semi-finals (l. to Nadal).

Alexander Zverev, who is a part of the ATP’s Next Generation, knocked out Grigor Dimitrov, nine spots higher than him at No. 35 in the Emirates ATP Rankings, 6-1, 6-4 in 69 minutes. Zverev hit 15 winners, including six aces on his tournament debut, while 2014 semi-finalist Dimitrov committed 20 unforced errors.

Guillermo Garcia-Lopez notched his first win over Fabio Fognini in more than four years. Garcia-Lopez, who reached the third round in 2010 and 2015, silenced Italian supporters with a 6-1, 7-6(2) win.

Elsewhere, Ernests Gulbis improved his perfect record to 3-0 against Ivo Karlovic after withstanding 23 aces from the giant Croat in a 6-7(3), 6-2, 6-3 win in just under two hours.

Kohlschreiber/Troicki Save Four Match Points

In doubles action, Philipp Kohlschreiber and Viktor Troicki saved four match points against Henri Kontinen and John Peers for a 6-4, 1-6, 15-13 victory. Kohlschreiber and Troicki recovered from the brink of defeat at 7/9, 10/11 and 11/12 in the Match tie-break.

I missed a flight?
I always get on the flight. I never miss it because I’m changing the flight every last second. The good thing, many times I book the flight when I’m in the transportation. So that’s why I was lucky that I didn’t miss it… Many times I have to rush but the good thing is I never miss it.

I lost something important?
I lost my phone in Rio… I was just leaving in the gym and then I went to practice, I went to shower, and then after two and a half hours, I said, “Oh, I forgot the telephone in the gym.” I went there, and they still had it. They put it in a bag, and they gave it back. So I was very lucky.

I paid money to rent a tennis court or buy tennis balls?
Two years ago… Ortisei, Italy… I was with my girlfriend. She wanted to play tennis. It was a holiday. I called the tournament director. They said, “OK, come when you want.” I was booking the court. I went there and paid for the court… €20.

Being famous helped me?
That has happened sometimes in my home city.

I strung a tennis racquet?
It’s never happened. I never string. No, never learned. I think it’s hard to do that. No idea.

I cooked for myself and others?
That’s also another problem, huh? Because we have many restaurants… I think the last time that I cooked was six, seven years ago. I never cook. I go to the restaurant… I love tortellini so I was cooking tortellini. But I’m not cooking so much.

I met a childhood idol?
When I was young, my idol was Boris Becker but now I see him at many tournaments with Novak (Djokovic)… I was watching him many times when I was young. I think the first time I saw him was at Wimbledon.

I shared a hotel room with another player?
I have with a friend in Italy… Many times he has lived with me during the tournaments… The last time that happened was this year in January.

I asked someone famous for an autograph or selfie?
That’s a good question… I don’t do a lot of pictures. I don’t remember.

Andy Murray announced today that he has parted company with his coach Amelie Mauresmo.

Murray, who had worked with Mauresmo since June 2014, said, “She’s been a calming influence in the team and we will all miss having her around. I’ll take some time to consider the next steps and how we progress from here, but I’d like to thank her for everything she has done. She’s been an invaluable member of the team.”

The announcement comes a day after the 28 year old lost to World No. 1 Novak Djokovic in the final of the Mutua Madrid Open, where Jamie Delgado was in his corner. Delgado was brought in by Murray to support Mauresmo, who gave birth to a boy in August 2015, after this year’s Australian Open.

“Working with Andy over the past two years has been a fantastic experience for me,” said Mauresmo. “I’ve thoroughly enjoyed being part of the great team of people he has around him. Dedicating enough time along with the travel has been a challenge for me. I wish him and team well and I hope he goes on to win many more titles.”

Since teaming up on 8 June 2014, Murray has gone 7-5 in tour-level finals. In that time, he reached No. 2 in the Emirates ATP Rankings and was runner-up in the 2015 and 2016 Australian Open finals (l. to Djokovic both times).

Former WTA World No. 1 Mauresmo won the Australian Open and Wimbledon in 2006.

Murray has been previously coached by Leon Smith (1998–2004), Pato Alvarez (2003–2005), Mark Petchey (2005–2006), Brad Gilbert (2006–2007), Miles MacLagan (2007–2010), Alex Corretja (2010–2011), Ivan Lendl (2011–2014) and Jonas Bjorkman (2015). Murray won the 2012 London Olympics gold medal, 2012 US Open and 2013 Wimbledon titles with Lendl.