Andy Murray 'not proud' of his behaviour at Australian Open

Andy Murray admits his off-court distractions have unsettled him and made him tetchy at the Australian Open.

The world No.2's wife Kim is due to give birth next month and he was ready to quit the tournament after his father-in-law Nigel Sears collapsed courtside last week.

Murray was bad-tempered during his four-set quarterfinal win over David Ferrer on Wednesday with emotional outbursts aimed at coach Amelie Mauresmo and the rest of his team.

"I'm not particularly proud of the way I've handled myself on the court and I don't think that my behaviour has been impeccable," Murray, who faces Milos Raonic in the semifinals on Friday, told British newspapers.

"I've shown a lot of emotion and have been getting upset. Although I'm not exactly being positive with myself, I'm still very difficult for my opponents and fighting hard for every point."

Former Australian Open winner Mauresmo will surely have been a calming influence in Melbourne, though, having returned to Murray's coaching set-up after giving birth to baby son Aaron in August.

"We know that right now it's a little bit complicated for him, with much to handle," Mauresmo told British newspapers. "He responded well physically because there have been some harsh passages, and so there are ups and downs.

"But he still manages to beat Ferrer after a big fight and it was a beautiful performance. He knows he can count on us."

It had been believed that Murray's first child was due in mid-February but there is speculation wife Kim could go into labour earlier.

Murray has previously stated he has no problems flying home early from Melbourne to attend the birth even if he is still in the tournament.

"I do think what it would be like to be home just now. Each day that passes I'm closer to that, which is positive," he added.

"And with each day that passes, it's also closer to the birth as well. I get more anxious about that as well, so hopefully everything's all right in the next few days."