Sam Querrey beats Lukas Lacko in straight sets

Sam Querrey has sealed a place in the second round of the French Open, having beaten Lukas Lacko in straight sets.

The 18th seed took just over 20 minutes to secure the opening set, getting a break early to take it 6-3.

Lacko showed more resistance in the second and third sets, but Querrey was able to find a way to get the break each time, and wrap the match up in just over 90 minutes.

The American's serve never came under threat, as he fired 10 aces past his opponent and made just one double fault.

Querrey will face Jan Hajek in the second round.