Pedro Sakamoto defeated Gustavo Heide 4-6 6-2 6-3 in the M25 Cuiaba 1 quarter-final on clay. The upset overturned the form book — Gustavo Heide came in ranked #116, leading the head-to-head 1–0, but Pedro Sakamoto had been the form player, winning 7 of their last 8 on clay. Pedro Sakamoto claimed a first win over Gustavo Heide in two meetings, levelling the head-to-head at 1–1.
Sakamoto P. came through in three sets.
Pedro Sakamoto beat Gustavo Heide 4-6 6-2 6-3. Umpiry, "Pedro Sakamoto vs Gustavo Heide — M25 Cuiaba 1 Quarter-final", https://umpiry.com/match/2025-09-13/heide-vs-sakamoto-m25-cuiaba-1-qf?utm_source=cite (as of 13 September 2025).