Sixth seed Andy Roddick came through another potentially tricky encounter on Friday when his ever reliable serve helped him to a 7-5 6-7 6-3 6-3 victory over Germany's Philipp Kohlschreiber in the Wimbledon third round.                                              
The 29th seed has a game nicely suited to grass and the two battled out two tight first sets, with the German recovering from 4-5 0-40 in the second to save that game and claim the tie-break on his first set point.                                            Roddick, who lost his third final to Roger Federer 12 months ago, retained his focus the better though and sealed victory with another thunderbolt ace after two hours and 56 minutes.          
He will face Taiwan's Lu Yen-Hsun for a place in the quarter-finals.