Flamengo netted twice in quick succession after the restart: first with a stunning first-time effort from playmaker Everton Ribeiro and then with a cool Arrascaeta finish after a counterattack.
English Premier League announces the termination of cooperation with Chinese broadcaster PP Sports.
Luneng, who lost to Dalian Pro 1-0 in the last round, hit the woodwork twice during the game against Suning.
Arrascaeta restored his team's two-goal advantage with a diving header in heavy rain but Jose Pimentel responded with his side's second goal just before halftime.
Elsewhere Sky Sports informed that Chelsea have reached agreement with Bayer Leverkusen to sign striker Kai Havertz. Enditem
Valter, 22, broke free during the final few kilometers and the peloton was unable to catch him.
Fourth seed Naomi Osaka of Japan booked her place in the third round with a comfortable 6-1, 6-2 win over Italy's Camila Giorgi.
"It's a great motivation for me to want to do well this tournament, but for the most part I feel like I've been in quarantine and practising for so long, so I prefer to play matches," Osaka said.
"Our original partnership was mainly focused on the World Cup in China. We are thrilled that this has now expanded to be a more all-encompassing partnership across all FIBA competitions."
Also on Thursday, former Italian international Eder scored the winner to help Jiangsu Suning beat Shangdong Luneng 1-0.
"The Premier League confirms that it has today terminated its agreements for Premier League coverage in China with its license in that territory, the Premier League will not be commenting further on the matter at this stage," read a statement.