London, UK, 15 November 2017 | tennis.com.au

John Peers and Henri Kontinen have kept their semifinal hopes alive in London with a hard-fought victory over Jean-Julien Rojer and Horia Tecau.

It took 12 match points, but the Aussie-Finn duo eventually sealed a 7-6(3) 7-6(6) win at the O2.

Peers and Kontinen are the defending champions at the ATP Finals and now own a 1-1 record in 2017 after falling in their first round-robin match to Ryan Harrison and Michael Venus.

Harrison and Venus moved atop the group with a 2-0 record after beating French pairing Nicolas Mahut and Pierre-Hugues Herbert in a match tiebreak on Tuesday.

Peers and Kontinen will play Mahut and Herbert on Thursday; the winning team will seal a semifinal berth.