Yannick Mertens defeated Tiago Cacao 6-3 6-7 7-6 in the M15 Sintra 2 quarter-final on hard. Yannick Mertens moved ahead in the head-to-head, 2–1.
Mertens Y. came through in three sets.
Yannick Mertens beat Tiago Cacao 6-3 6-7(8) 7-6(1). Umpiry, "Yannick Mertens vs Tiago Cacao — M15 Sintra 2 Quarter-final", https://umpiry.com/match/2019-08-23/cacao-vs-mertens-m15-sintra-2-qf?utm_source=cite (as of 23 August 2019).