Tennis: World number one Roger Federer got his quest for a fourth Tennis Masters Cup title back on track with a 6-4 6-3 win over Nikolay Davydenko.
Following Federer on court, Andy Roddick became the first player to book a semi-final spot at the season-ending event in Shanghai after crushing Chile's Fernando Gonzalez 6-1 6-4.
Federer, stunned by Gonzalez in his Red Group opener on Monday, was again below his best but he was still good enough to eliminate Davydenko from the showcase eight-man tournament.
"It was a different situation coming back from losing," shrugged the Swiss, who had never lost a round-robin match at the Masters Cup before being ambushed by Gonzalez.
"Here you lose and you play another top 10 guy. This was a top-four guy so it doesn't get any easier. Anything can happen in the men's game."
Federer, who has a 14-1 record against Roddick, must now beat the American in his final group match on Friday to avoid an early exit from the event.
