LONDON, Jul (Reuters) - Men's tennis singles first round at the 2012 London Games on Saturday.

Results Table

8-Juan Martin del Potro (Argentina) beat Ivan Dodig (Croatia) 6-4 6-1 Gilles Muller (Luxembourg) beat Adrian Ungur (Romania) 6-3 6-3

Alex Bogomolov Jr. (Russia) beat Carlos Berlocq (Argentina) 7-5 7-6(5)

12-Gilles Simon (France) beat Mikhail Kukushkin (Kazakhstan) 6-4 6-2

Andreas Seppi (Italy) beat Donald Young (U.S.) 6-4 6-4

1-Roger Federer (Switzerland) beat Alejandro Falla (Colombia) 6-3 5-7 6-3

Malek Jaziri (Tunisia) beat Lu Yen-Hsun (Taiwan) 7-6(10) 4-6 6-3

Grigor Dimitrov (Bulgaria) beat Lukasz Kubot (Poland) 6-3 7-6(4)

Denis Istomin (Uzbekistan) beat 14-Fernando Verdasco (Spain) 6-4 7-6(9)

Julien Benneteau (France) beat Mikhail Youzhny (Russia) 7-5 6-3

11-Nicolas Almagro (Spain) beat Viktor Troicki (Serbia) 6-4 7-6(3)

10-John Isner (U.S.) beat Olivier Rochus (Belgium) 7-6(1) 6-4

Steve Darcis (Belgium) beat 6-Tomas Berdych (Czech Republic) 6-4 6-4

7-Janko Tipsarevic (Serbia) beat David Nalbandian (Argentina) 6-3 6-4

Philipp Petzschner (Germany) beat Lukas Lacko (Slovakia) 7-6(5) 6-1

Santiago Giraldo (Colombia) beat Ryan Harrison (U.S.) 7-5 6-3