^ 17-9 was at the beginning of the year, in 2012 he added wins over Istomin, Dodig and McClune which give him 20-9 (.689) - the third best record among players to win at least 20 tie-breaks of this kind
Singles : 151 (Best 88) - W Bucharest Fut, F Mersin CH, SF Furth CH
Doubles : 60 (Best 51) - W Bogota (with Rodrigo R3) SF Brisbane (with Sheva), SF Indian Wells (with Tomek.), F Bordeaux CH (with Daniel_amr)
This stats shows we can expect at least one match of this type at every Slam, strangely no-one won a m.p.-down match in Paris four years running, even though in Paris occurred a tournament with the most m.p.-down wins (2004), which is maybe even weirder.
Theoretically winning on clay from a match point down is tougher because matches are longer out there, so in a 5th set a player who faces a match point is potentially more tired than at other majors, moreover it's tougher to gain quick points directly with serves or with a serve-(another shot) 2-stroke combo.
__________________ stroke <- point <- game <- set <- MATCH -> round -> tournament -> season -> career