Family man Roger Federer admits his unexpected run to the Australian Open semi- finals is starting to inconvenience at least one of his four kids.
The champion Swiss says he's loving his extended summer down under with wife Mirka and their two sets of identical twins, seven-year-olds Myla Rose and Charlene Riva, and two-year-olds Leo and Lenny.
The Federers have been in Australia since late December, with the 17-times grand slam winner choosing the Hopman Cup in Perth as the ideal place to make his comeback from six months out recovering from a knee injury.
But the 35-year-old concedes they weren't planning on his working holiday lasting this long.
"With the late-night sessions I had to sleep in the morning so they knew dad can't be around that much in the mornings," Federer said after his straight-sets quarter-final win over Mischa Zverev on Tuesday night.