Also on Wednesday, 23-time Grand Slam winner and No. 6 seed Serena Williams was forced to pull out of the French Open ahead of her second round match against Bulgaria's Tsvetana Pironkova because of an Achilles injury.
Boca had 68% of possession and seven shots on target to Libertad's one, in what was largely a lopsided contest at La Bombonera.
The side coached by Diego Martinez had kicked off their campaign with league wins at home to Athletic Club and Alaves, while also getting through two Europa League qualifying rounds, with a 4-0 victory away to Albanian outfit, Teuta and a 2-0 win at home to Locomotive Tbilisi a week ago.
Real Madrid has won without really impressing at the start of the season and Zinedine Zidane will again have selection questions to answer when his side visits Levante. Eden Hazard is out for several weeks, but Vinicus Jr made his case to start with his winning goal at home to Valladolid on Wednesday.
However, unlike Bottas and Verstappen, Hamilton started the race on soft compound tyres and had to come in to change them sooner than he would have liked, while Bottas and Verstappen were able to go much deeper into the race on their medium compound rubber.
For the fifth placed Shenzhen, any prospect of promoting the top four appeared to be extinguished when Pouraliganji's powerful shot hit the crossbar on 75 minutes.
Greek fifth seed Stefanos Tsitsipas is among the other players through to the third round of the men's draw after he recorded a comfortable 6-1, 6-4, 6-2 win over Uruguay's Pablo Cuevas.
The single-leg match was played behind closed doors in the central city of Petah Tikva, after Beer Sheva's Turner stadium in southern Israel was closed in June due to structural concerns.
Ghana's most recent matches were wins against South Africa and Sao Tome and Principe in November 2019. Enditem
Coppa Italia holder Napoli trashed Genoa 6-0, with Chucky Lozano scoring a brace, but captain Lorenzo Insigne limped off with injury.
Also on Saturday, Andre Villas-Boas' Marseille, still struggling for a win, was held by Metz 1-1 at home.