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ITV, 9pm SHOUTY adventurer Bear Grylls is back, dragging yet another celebrity out into the wilderness for our viewing pleasure. Tennis champion Roger Federer is his latest victim – and probably one of the most nervous we’ve seen.

“I might look like a tough guy on the tennis courts but I’m actually quite scared of a lot of things in life,” he tells Bear.

Roger, 37, holds the accolade of ‘greatest tennis player of all time’ after winning 20 grand slams and taking the Wimbledon men’s title a record eight times.

But he’s well out of his comfort zone here.

Driving off into the Swiss mountains to meet Bear, he can feel his pulse racing and wonders where the adventurer is. Bear, of course, is falling out of the sky. He does this a lot.

Then it’s in at the deep end as they must descend a frozen waterfall and use tennis rackets as snowshoes (nice touch) to cross an icy lake.

Roger, understandably, is a bit concerned about getting an injury since he has a tournament in a week’s time.

But gung-ho as ever, Bear pushes on through, offering up a snack of frozen fish eyeballs that “explode with blood and fluid”.

It’s not all sheer cliff faces and treacherous drops though. Bear also challenges Roger to a ping pong match, revealing the competitive side of FedEx.

And there are little camp fire moments when Bear, er, grills Rog on his personal life, revealing some intimate aspects of raising two sets of twins. All in all, this show’s a grand slam adventure.