Roger Federer admitted that he sent a text message to Rafael Nadal on Tuesday night following the Spanish superstar’s quarter-final exit to Marin Cilic at the Australian Open.

World No. 1 Nadal retired due to a right leg injury at 0-2 in the fifth set and later said he would undergo an MRI scan in Melbourne on Wednesday.

Federer, speaking after his 7-6(1), 6-3, 6-4 victory over Tomas Berdych for a place in the semi-finals on Wednesday night, told Jim Courier in an on-court interview, “I wrote to Rafa late last night before I went to bed. It was the last thing I did, to make sure he was okay. It was not nice to see a rival and friend go out.

“We wish him well. It’s hard to watch someone go out in five sets and not be able to finish. I think Marin deserves an amazing amount of credit because he hung around and fought really, really hard. It was a massive win for him.”

Read Reaction: Nadal – “An Opportunity Missed”

Nadal issued a statement on Wednesday allaying any long-term injury fears.

“After the painful withdrawal last night at the Australian Open, today I had an MRI here in Melbourne,” Nadal posted on social media. “The results say that I suffer from a Grade 1 injury to the [sic] Psoas Iliac on my right leg.

“As bad as it is to have to retire from the quarter-finals of a Grand Slam tournament, the injury is not so serious. In the next few days I will be in sports rest and perform anti-inflammatory physiotherapy.

“The doctors tell me that in two weeks I will be able to get back on court, progressively resuming my workouts. The normal recovery time is around three weeks so in principle that does not change anything in my calendar and I will play in Acapulco, Indian Wells and Miami.”

Nadal is expected to return to the ATP World Tour on 26 February for the Abierto Mexicano Telcel presentado por HSBC, where he picked up the 2005 and 2013 trophies.

The tournaments change, the courts differ but seemingly everywhere Hyeon Chung plays these days, the South Korean always brings his “pokerface”.

Read More: Chung Keeps His ‘Pokerface’ in Milan

Two months after winning the inaugural Next Gen ATP Finals in Milan, Chung secured yet another career breakthrough on Wednesday at the Australian Open. The unseeded 21-year-old dismissed Tennys Sandgren of the U.S. 6-4, 7-6(5), 6-3 to extend his greatest run at a Grand Slam, becoming the lowest-ranked man to make the Australian Open semi-finals since No. 86 Marat Safin in 2004.

Chung will now play in his first Grand Slam semi-final against either second seed Roger Federer or 19^th seed Tomas Berdych.

The 6’2” Chung, who had never reached past the third round of a Grand Slam (2017 Roland Garros) before this fortnight, joined Brit Kyle Edmund in the semi-finals, marking the first time multiple unseeded players have made the Australian Open semi-finals since Thomas Enqvist, Tommy Haas and Nicolas Lapentti in 1999.

Chung’s maiden quarter-final was the first time he had been the higher-ranked player all tournament. Chung had to upset 32^nd seed Mischa Zverev, No. 53 Daniil Medvedev, fourth seed Alexander Zverev and 14^th seed Novak Djokovic to make the last eight.

But the South Korean fared just as well in his new role as he had as an underdog. Chung was consistent on serve all match against No. 97 Sandgren, who was also playing in his first Grand Slam quarter-final.

South Korea’s No. 1 landed 76 per cent of his first serves for the match – in addition to placing it well – and the shot carried him to a one-set lead as he erased both break points in the opener.

Sandgren settled down in the second, matching Chung’s powerful groundstrokes from side to side. At 5-3, the American served to even the match, but Chung kept Sandgren on the move with his sliding defence and deep groundstrokes and broke back before the best tennis of the match was played in the tie-break.

But yet again, as it was when Chung faced Djokovic and they battled in two set tie-breaks, the South Korean looked as if he wasn’t phased by the moment. Sandgren cracked first, framing a forehand at 5/5 before Chung gained a two-set lead. He clinched his spot in the semi-finals on his sixth match point.