WASHINGTON — A weary-looking John Isner hit serves in the low 90s mph and was broken twice in the opening set during a 6-4, 7-6 (6) loss to 152nd-ranked Noah Rubin in the second round at the Citi Open on Thursday.
The No. 2-seeded Isner was coming off a title in Atlanta last week and a semifinal run at Wimbledon last month.
His all-American matchup against Rubin originally was supposed to be played Wednesday, but was postponed because of a thunderstorm.
Rubin, whose right sneaker fell apart during a point in the second set, was scheduled to play his third-round match later Thursday. That was going to be against 16th seed Andrey Rublev, who completed a 7-6 (5), 6-4 victory over Tommy Paul earlier in the day.
In women’s action at the hard-court tuneup for the U.S. Open, Nao Hibino withdrew before her match against No. 6 seed Belinda Bencic because of an injured abdominal muscle.
PRAGUE — Two-time Wimbledon champion Petra Kvitova says she will decide later this week if she’s ready to play at the All England Club.
The 29-year-old Czech player injured her left forearm during training in Paris ahead of the French Open and has not played since. The injury prevented her from defending her title at the Birmingham Classic this week.
Kvitova wrote on Twitter that she was “Happy to tell you that my arm is improving and I just hit some balls on the beautiful grass for the first time.
The sixth-ranked Kvitova, who won the Wimbledon title in 2011 and 2014, reached the Australian Open final and won tournaments in Sydney and Stuttgart this year.
LONDON — American tennis player Anna Tatishvili has appealed her fine of about $50,000 for what the Grand Slam Board ruled was a violation of its first-round performance rule at the French Open last month.
Tatishvili was docked a first-round loser’s full prize money after losing to 29th-seeded Maria Sakkari of Greece 6-0, 6-1 in Paris.
It was Tatishvili’s first competition since October 2017 because of an ankle injury. She has been ranked as high as 50th and is currently outside the top 700 because of her long absence from the tour, but used a special ranking to make the field at Roland Garros.
The Grand Slam Board introduced the performance rule before the 2018 season. The aim is to deter players who enter tournaments while injured from retiring during first-round matches to collect prize money. Players can be fined their first-round check if they do not “perform to a professional standard.”
Injured players who withdraw before the tournament – allowing someone who lost in qualifying to get into the draw – receive half the first-round prize money.