Koeman changed the style Barca used under Quique Setien, adapting a 4-2-3-1, with Antoine Griezmann leading the line, Frenkie de Jong and Sergio Busquets in the midfield holding roles and Messi, Philippe Coutinho and Ansu Fati in an attacking line of three.
The Championship League has been expanded to a full World Snooker Tour ranking event this season, featuring 128 players in three stages over 21 days.
File photo taken on Aug. 31, 2020 shows that the torches for the Tokyo 2020 Olympic and Paralympic Torch Relay are on display at Japan Olympic Museum in Tokyo, Japan. The route and schedule of the torch relay for the postponed Tokyo Olympic and Paralympic Games will remain as originally planned, the Tokyo 2020 organizers announced on Sept. 28, 2020. (Xinhua/Du Xiaoyi)
"I'm really pleased with the victory. It's always tough to start the tournament. I was a bit nervous. She played really well in the first set, she didn't miss. Then I just found the rhythm," said the 2018 champion.
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 Latvian had been knocked out at the first round in 2018 and 2019. She will play Spain's Paula Badosa in the third round.
The Belgian, who arrived from Chelsea for around 100 million euros in the summer of 2019, has struggled with a range of injuries since his arrival and taken part in just 22 games from a possible 53 since joining from Chelsea. Enditem
In the 85th minute, Feng fell to the ground again in the box after a close contact with Shanghai defender Shi Ke, but the referee did not give a penalty judging that Feng tripped himself.
Hebei's Zhang Yifan took first in the women's 200m butterfly, and Zhang Ziyang from Hubei scooped gold in the men's 1,500m freestyle.
Selby revealed that one of his targets this season is to get to number one in the world rankings.
Led by two-time world champion Xu Jiayu from Zhejiang, the Chinese swimmers bettered the world record by 0.15 seconds. The previous record was held by American swimmers.