Is Roger Federer finished after his first ever Wimbledon semi-final defeat?

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Roger Federer wore the face of a man who knew that his last hopes of reaching yet another Wimbledon final had probably just evaporated following his five-set defeat to upcoming gun Milos Raonic.

The 17-time grand slam champion had made the plush surrounds of Centre Court his own during a storied career, claiming seven titles. But the prospect of him further furnishing that record appeared over as his ageing body failed to hold up to the young pretender from Canada.

Roger Federer walks off court after losing to Milos Raonic
(Steve Paston/PA)

Federer had never before lost a semi-final at Wimbledon, and as he contemplated that unchartered territory while he waited courtside for Raonic to finish lapping up his new-found acclaim, Twitter was already wondering whether this was the end of one of tennis' greatest stories.

The Swiss was as classy as ever in defeat, waiting for Raonic before making his exit, but perhaps tellingly he stopped short before walking off the court and waving to the fans that he has given so much joy to during his career.

Was this the final goodbye? The dejected look on Federer's face as the cameras continued to follow him made it hard to rule out.

What is certain is that we are talking about a champion, and a champion who has proved time and time again that writing him off is a foolish mistake.

The 34-year-old won the most recent of his 17 majors four years ago, but has shown again over the past fortnight that he is still very much at the top of the men's game. And on this evidence, it still takes plenty to beat him - especially on grass.

But while there was reason to lament the potential end of one of one of tennis' great careers, this was also a moment to celebrate the most significant moment in Raonic's burgeoning career.

The 25-year-old established some "firsts" of his own in getting to the final.

And there's this too...

Perhaps this really was a changing of the guard?