Question: How many singles titles on the ATP tour have been won by the person who replaced Teymuraz Gabashvili as inaugural champion?
Sentence (from "Nino Serdarušić"): He made his ATP main draw debut at the 2014 ATP Vegeta Croatia Open Umag in the doubles event, partnering Dino Marcan, losing in the first round to the second seeds Pablo Cuevas and Horacio Zeballos in three sets.
Relevant evidence: No