Federer mengundurkan diri dari turnamen yang diikuti oleh delapan petenis undangan dengan alasan sakit perut, Senin, meski demikian dia berharap dapat menlanjutkan latihan pada akhir pekan sebagai persiapan akhir menghadapi grand slam Australia Terbuka.
Federer withdrew from the eight-man invitational event on Monday with a stomach virus, though he said he expected to resume training later this week as he finalised preparations for next week's Australian Open, the season's opening grand slam.