Sock, Chung through at Delray Beach

Jack Sock and Hyeon Chung moved into the Delray Beach Open second round.

American Jack Sock   -  Getty Images

Defending champion Jack Sock reached the Delray Beach Open second round, while Hyeon Chung also advanced on Monday.

Sock broke once in each set on his way to a 6-4 6-4 victory over Australian qualifier John-Patrick Smith.

The American top seed only created two break points – converting both – while saving four to get through his opener.

In action for the first time since his run to the Australian Open semi-finals, Chung – the eighth seed – got past lucky loser Cameron Norrie 3-6 6-3 6-1.

Meanwhile, Donald Young crushed Ramkumar Ramanathan 6-1 6-2 and Frances Tiafoe overcame Matthew Ebden 6-2 2-6 6-2.

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