India's tennis ace Leander Paes, now undergoing treatment at Orlando, USA, for a brain cyst, is stable and cheerful, his father Dr Vece Paes informed in Kolkata on Thursday.

"He is now stable. The headache has gone. The other disturbances are also less. He seems more cheerful and better now," the senior Paes said.

Vece Paes, who could not leave for US yesterday as he missed the connecting flight from Kolkata to Delhi, said he would be flying out to Mumbai this evening en route to Orlando.

Medically termed 'space occupying lesion', the four millimetre cyst in the 30-year-old Leander's brain, in the left posterior of the head, will keep him out of action for a month, besides making his participation uncertain in the Davis Cup World group qualifying fixture against Holland next month.

It has also jeopardised Leander's team-up with former partner Mahesh Bhupathi at the $355,000 ATP Tour event in Long Island, New York.

One of the world's most successful Davis Cuppers, Leander won three Grand Slam doubles titles with Bhupathi and the Wimbledon mixed doubles title in 1999 with Lisa Raymond. He teamed up with legendary Martina Navratilova to capture the Australian Open and the Wimbledon mixed doubles titles this year.

Altogether, Paes has won 27 ATP Tour titles.