Djokovic is still seeking his first title of the season after winning his 99th title last August at the Paris Olympics. He has lost four finals since then. The only two players to reach the 100-title milestone are Jimmy Connors (109) and Roger Federer (103). Arnaldi will next face Damir Dzumhur after he rallied past Sebastian Baez 1-6, 6-1, 6-2.