World number seven into his second straight semi-final at Roland Garros.
An abdominal problem forces the Spaniard to withdraw after 50 minutes of action.
Patrick Mouratoglou says Nadal is currently playing like a train at full speed.
Andy Murray is playing his seventh French Open quarter-final.
Wawrinka is looking to win his second French Open title.
World number one's former coach believes Murray is peaking at the right time.
Federer has won 19 of his 20 matches in 2017 despite missing six months with a knee injury.
Becker also thinks either Federer or Nadal can finish the year as number one in the singles race.
Nadal has lost just 20 games in his four matches in the French Open thus far.
A place in the last four is up for grabs as Djokovic looks to turn his year around.
Austrian is "physically and mentally" ready to challenge for grand slams believes Gunter Bresnik.
World number one brushes aside inexperienced Russian in straight sets at Roland Garros.
Djokovic is currently in the quarter-final of the French Open.
Despite security concerns, the tennis duo will feature at SW19.
Federer will play just two events after a 10-week break leading up to Wimbledon in July.
Nine-time champion completes fourth straight sets win of campaign at Roland Garros.
Andy Murray is currently in the round of 16 of the French Open as he looks to turn his year around.
Kyrgios crashed out in the second round of the French Open to Kevin Anderson.
World number one shows glimpses of his best in three-set win over Argentine.
The American admits he is not being paid for advising the 12-time major champion.
Federer took a 10-week break following his win at the Miami Masters.
Defending champion taken to five sets by world number 41 Diego Schwartzman.
Tennis professionals have called for a name change for the Margaret Court Arena in Melbourne.
World no.1 overcomes spirited Slovak in four sets in gritty affair at Roland Garros.
World number four chasing 'La Decima' at Roland Garros.
Navratilova said the Margaret Court Arena in Melbourne should be renamed after Evonne Goolagong.
Nadal is seeking a 10th title at Roland Garros in 13 appearances.
Court claimed tennis is 'full of lesbians' and voiced her opposition towards same-sex marriages.
King of Clay is seeking to become the first player in the Open Era to win 10 titles at any Grand Slam event.
74-year-old Margaret Court told a Christian radio station transgender children are the work of "the devil".