The reigning Portuguese champions have offered 15 million euros (around 18 million U.S. dollars) to prise the 23-year-old away from Porto Alegre, Globo Esporte said on Wednesday.
Tianjin rode an early 8-0 spurt to race ahead, and compiled a 25-19 advantage as the first quarter ran out.
1 Fati ready to become new Barca hero
Registered runners will now have the choice to defer their registration into next year's event or receive a refund of their entry fee.
"I am really happy about my first round. I was facing another great champion today. The transition to clay and the cold conditions worked out pretty well," said Thiem.
The result left Flamengo, the reigning Brazilian and South American champions, sixth in the 20-team league standings with 18 points from 11 matches. Palmeiras are fourth with 19 points.
MADRID, Sept. 27 (Xinhua) -- Ansu Fati scored twice and won a penalty with a magnificent first half performance as FC Barcelona beat Villarreal 4-0 in Ronald Koeman's debut as Barca coach.
In women's singles actions, 23-time Grand Slam champion Serena Williams survived a topsy-turvy opening set to ultimately ease past fellow American Kristie Ahn, 7-6(2), 6-0 to advance. Enditem
Brazil's Gremio also secured their place in the tournament's next phase on Tuesday, with a 2-0 home win over Chilean side Universidad Catolica. Pepe and Antonio Rodrigues were on the scoresheet for the Porto Alegre outfit.
While Barca's pre-season was all about veteran players leaving and Leo Messi wanting to leave the club, their league debut at home to Villarreal was all about Ansu Fati. The 18-year-old was at the heart of nearly all the good things his side did in the first half as they went 4-0 up in just 45 minutes to assure Ronald Koeman a placid debut as coach. He scored the first two goals with an exhibition of cool finishing and then provoked the penalty which Messi slotted away to make it 3-0.
The Bianconeri got back on level terms again in the 68th minutes as Ronaldo steered his header into the net on Danilo's cross.