9th seeded Isner couldn’t find his rythm and after he lost the first set, Kohlschreiber had a big chance to serve out the match at 6-2 5-4 up, but failed to do so. The American prevailed in the tiebreak, forcing a deciding set.
After the Munich Open title winner Kohlschreiber dropped his serve at the beginning of the third set, there was no way back for him into the match and Isner set up a second round encounter against Italy’s Andreas Seppi, who defeated Denis Istomin of Uzbekistan 6-4 3-6 6-3.
Former world no.3 David Nalbandian of Argentina also moved into the second round after beating world no.39 Albert Ramos of Spain 6-3 6-4.
Nalbandian’s opponent in the next round will be British no.1 Murray, who pulled out of last week’s Madrid Masters due to back problems.