Welcome to text coverage of Roger Federer's Australian Open quarter-final against Jo-Wilfried Tsonga.

TSONGA 6-7(4) 2-2 FEDERER - Bang, bang, bang, bang. Tsonga back level in double-quick time.

Watching at home? Or having a cheeky peek at work? Will Federer's improving first serve - up to 60 per cent now - make the difference, or Tsonga's power game?

You can watch this match LIVE on British Eurosport in HD, or online using the Eurosport Player.

TSONGA 6-7(4) 1-2 FEDERER - Federer, already in control of his service game, changes up the first serve after the first one clips the netcord for an ace up the middle. A backhand volley takes the score to 40-30, but the resistance ends there.

TSONGA 6-7(4) 1-1 FEDERER - All about the serve as Tsonga chases the returns down - when they come back, that is. He strikes one into the net, but it is a momentary aberration.

TSONGA 6-7(4) 0-1 FEDERER - Opening hold from Federer, who is sporting some quite amazing pink laces again today. Tsonga's yellow ones are rubbish in comparison.

TSONGA 6-7(4) FEDERER - SET - Federer seems to have three set points in the bag as he comes forward but Tsonga passes him brilliantly from deep. However the Swiss's serve and volley gives him two chances - and he seals the set as Tsonga fires into the net!

TSONGA 6-6(3-5) FEDERER - Net advance and smash from the world number two then he challenges an ace called wide - about a millimetre of the ball was in! Tsonga's face is a picture...

TSONGA 6-6(2-3) FEDERER - Federer somehow gets back a 134mph serve - the fastest of the match but Tsonga takes both servive points nonetheless.

TSONGA 6-6(0-3) FEDERER - What Tsonga believes is an ace is called out by the umpire. He challenges, unsuccessfully. And Federer's following two service points also go his way.

TSONGA 6-6 FEDERER - TIE-BREAK - Federer's first serve down around 50 per cent, but that figure has improved in the last couple of games. It sees him hold again - alongside a cross-court forehand - and we go to a tie-break. Federer's ever-changing second serve is very dangerous too, of course...

TSONGA 6-5 FEDERER - Whenever Federer just manages to return a powerful first serve, Tsonga is there to punish him anyway. Love game for the Frenchman now. Federer will serve to stay in the set for a second time.

TSONGA 5-5 FEDERER - Lethal first serving gives Federer the most simple of holds.

TSONGA 5-4 FEDERER - Tsonga successfully challenges an out call on a first serve. Federer not impressed... he comes back to 15-30 but Tsonga pulls out his ninth winner of the match, to Federer's six, to level. Tsonga then smashes into the ground and Federer leaps to send back a vicious swerving drive from behind the baseline which Tsonga fails to volley. However the big man's service game sees him save the break point and move within a break of the set.

TSONGA 4-4 FEDERER - The first serve comes off the frame of Tsonga's racquet and it doesn't get much better for him from there, despite a double fault. Solid hold. This one may be going to the tie-break...

TSONGA 4-3 FEDERER - First ace of the match from Tsonga as he moves 40-0 up in quick style. He is unlucky to see a drive find the net then Federer edges closer still with one of his own which Tsonga cannot get back... but a smash from mid-court seals the hold. He is looking more confident all the time, while Fed is making errors.

TSONGA 3-3 FEDERER - BREAK - Tsonga, who doesn't seem to be bothered any longer by that back twinge, working hard to defend Federer's forehands - and the Swiss's accuracy begins to let him down. However the Frenchman's 0-30 advantage quickly becomes 40-30. Tsonga takes the game to deuce with a clever advance to the net then sends back a rocket of a return to gain advantage... Fed then over-hits to seal the break back!

TSONGA 2-3 FEDERER - Loose backhand from Federer and he is never really in this game - but he finds a quite wonderful winner up the line while defending to get the crowd going halfway through it.

TSONGA 1-3 FEDERER - Again, it takes Tsonga a couple of points to get going on the Federer serve. Finding his range, he comes back to 30-30 then a mis-hit gives him a break point... saved by Federer in style from the baseline. Tsonga felt something go in his back when returning there. Federer misses a forehand while coming forward but ultimately his quality earns him the hold.

Tsonga has lost five of his last eight meetings against players in the top 10. You can watch this match LIVE on British Eurosport in HD, or online.

TSONGA 1-2 FEDERER - Tsonga finds that big serve to gain control of this game. He then out-lasts his rival in a rally for 40-0 before a little jump on the backhand sees him hitting long. Federer sends back a body serve to close the gap to 40-30, but a long return sees Tsonga get on the board in this match.