Altmaier broke for 1-0 and again for 4-1, then broke to take the set 6-1, with Comesaña's sole resistance a deuce hold for 1-2.
Comesaña broke for 5-4 but Altmaier broke back for 5-5 and forced a tiebreak, surviving a 7 minute hold for 1-1 from Comesaña saving both break points.