Valencia made his return to action in Saturday’s 2-0 FA Cup triumph over Arsenal.
The Ecuador international had been out of action since September after sustaining a serious ankle injury against Rangers.
The England striker said: “I can’t tell you how good it is to see him back out there.
“It was Antonio’s first game back after six months out and he looked like he’d never been away.
“It’s fantastic for him and fantastic for us to have him back and playing the way he did.”