Roddick reaches last four

MASTERS CUP - RED GROUP Schuettler-----------P3 W2 L1 Roddick--------------P3 W2 L1 Coria-----------------P3 W1 L2 Moya-----------------P3 W1 L2

World number one Andy Roddick turned round an early break in the final set on his way to booking a semi-final with Roger Federer at the Masters Cup.

The young American beat Argentina's Guillermo Coria 6-3 6-7 (4/7) 6-3 in the Red Group, but it was not as easy in the final set as the score suggests.

Coria led 3-2 in the decider and was 40-love up in the sixth game on his serve.

However, he then lost 10 points in a row and Roddick closed the match out with two aces to set up a re-match of his Wimbledon semi-final with Federer.

On that occasion Federer played sublime tennis and downed Roddick on his way to taking the title.

In the Blue Group Wimbledon champion Federer maintained his 100% record in the tournament by hammering Juan Carlos Ferrero 6-3 6-1.

The 22-year-old Swiss star survived two break points in the sixth game of the first set and was never seriously troubled again.

MASTERS CUP - BLUE GROUP Federer-----------P3 W3 L0 Agassi-------------P3 W2 L1 Nalbandian-------P3 W1 L2 Ferrero------------P3 W0 L3

World number two Ferrero did manage to save a pair of match points but netted a backhand to eventually lose a match which only lasted 54 minutes.

Spaniard Ferrero - who lost all his matches at the Masters Cup - will now concentrate on the Davis Cup final against Australia at the end of the month.

Federer said: "I'm just happy the season is ending nicely.

"I was in a tough group, so to come through so easily - the last two matches especially - is surprising."

In the other match in the Red Group, seventh seed Carlos Moya of Spain caused an upset by beating German Rainer Schuettler 7-5 6-4.

Schuettler had won both of his round-robin matches coming into the match, whereas Moya had lost his.

The German sixth seed still goes through to Saturday's semi-finals, where he will face Andre Agassi in a repeat of January's Australian Open final.