UMAG, Croatia — Gastao Elias won a dramatic tiebreaker to upset top-seeded Pablo Cuevas of Uruguay in the second round of the Croatia Open on Thursday. The 72nd-ranked Portuguese rallied to beat 2014 champion Cuevas 3-6, 6-3, 7-6 (7) and reach his third quarterfinal this year after a grueling battle from the baseline. Cuevas was
