Muchova sends former champion Osaka packing in US Open second round

NEW YORK :Czech Karolina Muchova delivered a flawless display of serve-and-volley tennis to knock twice champion Naomi Osaka out of the U.S. Open with a 6-3 7-6(5) second-round victory on Thursday.

Muchova enjoyed the best season of her career last year before a wrist injury sidelined her for 10 months, but she looked back to her best at Arthur Ashe Stadium as she set up a third round meeting with unseeded Russian Anastasia Potapova.

Four-times major winner Osaka of Japan, who missed last year's tournament while on a maternity break, was brilliant in her opening round win over 10th seed Jelena Ostapenko but a handful of costly mistakes sunk her chances against Muchova.

"Honestly, this year the biggest win for me is that I could play again," said Muchova, who returned to the tour in June. "I'm really grateful that I'm able to play tennis."

The two big servers were deadlocked early in the match before Muchova converted a break point when she forced Osaka into a backhand error in the seventh game, and the former world number one dropped serve again in the ninth.

Muchova looked in cruise control with an easy hold in the opening game of the second set but Osaka battled hard to keep the match tight, fending off three break points in the next game.

Osaka broke Muchova with a powerful forehand into the corner in the ninth game of the second set and had the momentum as she went up 40-0 in the 10th, bringing the crowd to its feet at the same venue where she beat Serena Williams to win her first Grand Slam six years ago.

However, she let the match slip through her fingers as her forehand began to malfunction, the former world number one throwing her racquet in disgust as she sent one long on the second break point.

Muchova has not had