Petra Kvitova’s recovery from surgery after a knife-wielding intruder attacked her inside her home and injured her playing hand has been going well, according her spokesman Karel Tejkal.

Tejkal said the two-times Wimbledon champion has gradually started doing exercises with her injured fingers and “all have been going according to the plans and expectations”.

Kvitova had surgery on 20 December following injuries on her left hand in the attack at her home in the town of Prostejov the same day. She is expected to be out for up to six months.

Kvitova’s fellow players from the Prostejov tennis club have offered a reward of 100,000 Czech crowns (£3,150) for information leading to the arrest of the attacker, who still remains at large.