Top seed Roger Federer overcame a shaky start to see off Russian Nikolay Davydenko and reach the Australian Open tennis semi-finals.
From a set and 3-1 down, the world number one took an incredible 13 games in a row and won in four.
Federer's 23rd consecutive Grand Slam semi-final will be against Jo-Wilfried Tsonga who beat Novak Djokovic in five.
Federer had a few problems with the sun, but felt he just needed to hang in there.
He says he knew he wasn't looking good and didn't panic, reckoning that the sun would go down and taking a toilet break to ensure a few more minutes went off the clock.
Federer thought the match could turn around but he was surprised by how much it did as he went on that 13-game streak to all but seal it, despite Davydenko nearly forcing a tiebreak for a fifth set. Federer went on to win the wildly fluctuating match 2-6 6-3 6-0 7-5.
