Nadal almost breaks, but that's a massive serve from Raonic and Nadal can't guide it back in. Subsequent shots go wide and quickly, it's game Raonic. There hasn't been a break of serve since the first set.
We're at 3-3 in the tiebreak and Raonic is running around - making Rafa do just that! He produces a brilliant shot and Nadal slides to make it - the next one, he misses. And it's Raonic with the mini-break.
Mammoth shots from both players here and Nadal's returning well. Raonic pummels a forehand in and there's ever the delicate touch from the Spaniard, with what seems to be just the right amount of force.
Raonic is pushing Nadal quite a bit here. It's on good authority that Nadal was practicing with Mark 'The Scud' Philippoussis to understand how to return a big serve, but here we're seeing a great movement in the game and Nadal is on his feet. A shot goes wide - but no matter - Nadal makes up!
The women's doubles, being contested by Grand Slam winners Caroline Garcia and Kiki Mladenovic of France against Andrea Hlavackova and Shuai Peng, is going to a first set tiebreak at the moment. Only just.
Returning to the Australian Open this year, she defeats Karolina Pliskova in three sets - 6-4, 3-6, 6-4 to take the win. She's the first women's semi-finalist here, and will play the winner of the Serena Williams - Johanna Konta match.