Summary
Rafael Nadal came back from the dead against Daniil Medvedev Wednesday to keep his ATP Finals hopes alive and boost his chances of finishing as the year-end No. 1 .
Russia's Medvedev, who has won two Masters titles this season, took the first set on a tiebreak to leave Nadal staring down the barrel.
The 19-time Grand Slam champion fended off a match point on his own serve and then, roared on by the crowd, broke Medvedev twice to level the match at 5-5 and edged ahead 6-5 .
The Spaniard has qualified 15 straight times for the ATP Finals but has never clinched the title, won a record six times by Roger Federer and five times by Djokovic.
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