Querrey wins Delray Beach ATP opener

American Sam Querrey began his Delray Beach Open tennis title defence with a victory over Dudi Sela of Israel.

Fourth-seeded Querrey was leading 6-2 2-1 when Sela retired.

World No.35 Querrey advanced to a second-round match with either Jared Donaldson or Mikhail Kukushkin.

Eighth seed Kyle Edmund of Great Britain also advanced on Monday (Tuesday AEDT) with a 6-3 6-0 triumph over Adrian Mannarino of France.

Edmund next plays Lu Yen-Huen, who came from behind to beat Bjorn Fratangelo 4-6 7-5 6-4.

Yoshihito Nishioka of Japan won his first-round match 6-3 6-3 over qualifier Kimmer Coppejans of Belgium.

Nishioka will next face either fifth seed Steve Johnson or Stefan Kozlov.