Carlos Alcaraz made light of feeling under the weather as he dispatched Andrey Rublev in impressive fashion to revive his ATP Finals hopes on Wednesday.

The Spanish four-times grand slam champion has been suffering with respiratory issues in Turin and wore pink nasal tape against Rublev but enjoyed a resounding 6-3, 7-6 (8) victory.

The third seed, bidding to win the title for the first time, looked sharper than during his opening group match which ended in a straight-sets defeat by Norway’s Casper Ruud.

After sharing the opening six games, Alcaraz broke Rublev’s serve with a scorching forehand winner and reeled off five successive games to seize control of the match.

Rublev, the world No 8 who also lost his opening match to Alexander Zverev, managed to stay with Alcaraz in the second set and could have earned a couple of break points at 2-2 had he not missed a routine ball after chasing a drop shot.

A high-octane conclusion to the match saw Alcaraz fend off two set points in the tiebreaker before sealing victory. Rublev has now lost six successive matches at the ATP Finals in straight sets since reaching the semi-finals in 2022.

“I did surprise myself,” Alcaraz, who had to abandon a practice session on Tuesday, said on court. “I just tried to focus on my game and what I had to do and not that I wasn’t feeling well. Once you step on court you have to forget that. I felt good from the baseline running and felt I had more options today.”

Ruud will face world No 2 Zverev later on Wednesday with both players seeking their second win.

The opening tie of the Billie Jean King Cup finals between Spain and Poland has been postponed because of a severe weather alert in the Málaga region. Organisers said the decision was made “based on guidance from the relevant authorities to ensure the health and safety of all participants and attendees”.

The match has been moved to Friday, with the tournament now due to start on Thursday with matches between Japan and Romania, and Slovenia and the United States. Twelve teams are in Málaga to compete in the women’s tournament, with the men’s Davis Cup final starting at the same venue the following week.