Andy Murray believes he is closer to beating Roger Federer, Rafael Nadal and Novak Djokovic than he was "seven or eight" weeks ago, leaving him feeling "excited" about his future.
Murray, 32, won the European Open title last month, only his seventh singles tournament since January's hip surgery.
"I know if I played against the top players tomorrow there would be a very small chance of me winning that match," the ex-world number one told BBC Sport.
"But I do feel I could win."
Briton Murray feared he might have to retire after the hip resurfacing operation, but capped a remarkable return to singles action by beating fellow three-time Grand Slam champion Stan Wawrinka in Antwerp to win his first title since March 2017.