Mirnyi and Nestor suffered their first defeat in London

Marray and Nielsen beat the second-seeded combination of Nestor and Mirnyi 7-6 (3), 4-6, 12-10.

Daniel Nestor and Belarusian partner Max Mirnyi stayed in contention for a semifinal place at the ATP finals on Wednesday despite losing in group play to Wimbledon winners Jonathan Marray and Frederik Nielsen.

The British-Danish combination of Marray and Nielsen beat the second-seeded combination of Nestor and Mirnyi 7-6 (3), 4-6, 12-10 in a match that took one hour 40 minutes.

Nestor and Mirnyi, who won the title undefeated in 2011 during their first season together, are still in the chase to reach the deciding stage of the year-end classic after winning their opening match.