• Phil Lutton

Nick Kyrgios knows talking won't be enough to prove to his critics he is evolving as a player and a person, so in Brisbane he walked the walk as he spearheaded the quarter-final victory over the United States.

• Phil Lutton

Who wants to play Nick Kyrgios? Australian Davis Cup captain Lleyton Hewitt has welcomed all comers against his No.1 player as Australia tries to wrap up the quarter-final tie against the US.

Three matches at this year's Australian Open were investigated by the Tennis Integrity Unit who cleared them of any suspicion, the TIU has said.

• Phil Lutton

Australia's top player held his nerve against John Isner to help his team go 2-0 up in the Davis Cup tie, before saying his rejuvenated focus and hunger wouldn't satisfy all of his critics.

• Greg Baum

It's not just that Roger Federer at 35 is winning at the same rate as when he was 25. It's not just that he has beaten Rafael Nadal three times in a row for the first time in their long rivalry, all in finals.

• COMMENT
• Malcolm Knox

Will some wins for Australia win Australia over? It's a depressing thought. Yes, we all love a winner, but at what cost? Do we have no principles at all?

• Phil Lutton

The Australian singles No.1 said he would relish a five-set clash with John Isner in the wake of the Davis Cup draw for Friday's quarter-final against the Americans in Brisbane.

Anastasia Rodionova and Daria Gavrilova join Sam Stosur in the third round of the Charleston Open.

"Alright - I don't usually post stuff like this on social media … but special exception this time," the 21-year-old, who's become known as much for his tantrums as he has for his trick shots, posted on Facebook on Wednesday night.

Jack Sock has seen the best and worst of Nick Kyrgios and is bracing for more of the former in Australia's Davis Cup quarter-final tie against the United States.

• Charlie Eccleshare

The possible reforms are an attempt to shorten the length of matches and make the sport as attractive as possible to supporters and television companies, without losing the essence of the sport.

Samantha Stosur has started her claycourt season with a straight-sets win over former world No.1 Jelena Jankovic at the WTA tournament in Charleston.

• Phil Lutton

Nick Kyrgios says he is in the best headspace of his career and returning to Davis Cup duties will further lift his game.

'I'd be feeling the pressure if I were in Nick Kyrgios' shoes,' says United States captain Jim Courier.

• Eamonn Tiernan

Nick Kyrgios' Miami Open semi-final against Roger Federer one of the greatest matches ever played.

• Stephanie Myles

Roger Federer continued his recent mastery of Rafael Nadal when he beat his great rival 6-3 6-4 in the final of the Miami Open on Sunday.

• Darren Walton

Nick Kyrgios is vowing to keep his head down after confirming his status as a grand slam champion in waiting.

• UPDATED

Roger Federer needed more than three hours to outlast Nick Kyrgios 7-6(9) 6-7(9) 7-6(5) in a pulsating Miami Open semi-final on Friday to set up another mouthwatering final clash with Rafa Nadal.

• Jamie Marcuson

Nick Kyrgios continues his rich vein of form against the Swiss maestro for a spot against Rafael Nadal in the Miami Open final.

Spaniard so eager to reach the Miami Open final that he ran out of his shoe.

• Linda Pearce

A career that has been on the decline for six months is now on the precipice of a nasty freefall.

• Phil Lutton

The Australian captain said fatigue would not be an issue for his top-ranked charge as the Australians begin preparations for the Davis Cup tie against the USA in Brisbane next week.

• UPDATED

Australia's Nick Kyrgios will play Roger Federer in the semi-finals of the Miami Open after both won their quarter finals on Friday morning, AEDT.

Nick Kyrgios has continued his hot run with a straight-sets fourth-round defeat of eighth seed David Goffin at the Miami Open.

• Phil Lutton

Bernard Tomic remains in exile after Australian captain Lleyton Hewitt named an unchanged team for next month's Davis Cup quarter-final against the United States in Brisbane.

Australia's Samantha Stosur wasted a match point before crumbling to a three-set loss to Simona Halep in the fourth round of the Miami Open.

A frustrated Nick Kyrgios has prevailed over big-serving Ivo Karlovic in three tough sets to progress to the fourth round of the Miami Open.

• Eamonn Tiernan

Kyrgios hosted a Q&A; with his Twitter followers where he called for equality in player sanctions.

• Gene Cherry

Rafael Nadal has recovered from a dismal start to beat Philipp Kohlschreiber in the third round of the Miami Open.