And it's not just the European players getting involved.

As Tim Henman smarted from England's quarter-final heartbreak at the hands of Portugal, so too did Americans Serena Willams and Andy Roddick who adopted David Beckham's men.

Williams described Swiss referee Urs Meier's decision to disallow Sol Campbell's goal as "total robbery".

"What am I going to do now? I'm not going to watch any more," she said.

"Obviously, I don't want Portugal to win. I was really disappointed."

The women's top seed also had something to say about Beckham's miss in the penalty shootout.

"I don't know what it is about David Beckham and kicking," she said.

"I mean, he's doing much better than what I would ever do. But it's just -- I just was disappointed."

Roddick admitted to "jumping up and down" and "going crazy" during the nail-biting match.

"I think it's unreal how almost a whole country can stop and just really support their team," he said.

"I don't know if I've seen something like that in the States before.

"The only thing I can think of that kind of measures up is the Super Bowl, where everybody is somewhere watching it. But lots of times it's not their teams involved, so maybe it's not as intense."

Henman, who beat Ivo Heuberger in the second round, said: "Swiss referees. Swiss opponent today. Had to make sure I got some revenge."

Asked by a Portuguese journalist to rate the hosts' performance in the match, Henman smiled: "You were pretty lucky. Is that honest enough?"

He added, referring to the terribly worn penalty spot in the Lisbon quarter-final: "They could get some better turf as well, that would be helpful."

But one tennis player still smiling about football was Australia's Mark Philippoussis.

With no Australian representation in Portugal, the answer for Philippoussis was easy when he was asked whether he too had taken to supporting England.

"It was tough watching, but I wouldn't say I adopted them, no, I'm Australian," Philippoussis said.

"But I tell you what, that Greek blood in me, I'm going for Greece."

Greece beat France 1-0 on Friday night to reach the semi-finals.

Sweden is by far the best-represented country when it comes to the chance of claiming a tennis-football double with Jonas Bjorkman, Joachim Johansson, Thomas Enqvist and Thomas Johansson still in the singles draw.

Dutchman Sjeng Schalken and the Czech Republic's Denisa Chladkova are also in the running.