Maccabi increased the gap to 75-60 with seven minutes to go, securing the club's first Euroleague win of the season.
However, it added that Gremio are loath lose another regular goalscorer after the departure of Everton Soares to Benfica in August.
"I am available. I would be lying if I said Schalke's future leaves me cold," he said.
Women's top seed and 2018 champion Simona Halep dispatched her fellow Romanian Irina-Camelia Begu 6-3, 6-4 to book a spot in the third round, while third seed Elina Svitolina of Ukraine overcame a second-set wipeout to beat Mexican qualifier Renata Zarazua 6-3, 0-6, 6-2 to keep on track for her maiden Grand Slam title.
The first game of the day saw Alaves draw 0-0 at home to Getafe in a game where the first half was more open than the second. Enditem
But former Changchun Yatai striker Marinho equalized on the stroke of half-time and Kaio Jorge then bundled home from close range to guarantee Santos their fourth win from five matches.
All eyes were on Messi after a summer in which he had asked to leave the club and only two days after he had criticized the departure of Luis Suarez, but Fati was the star of the show.
Ronald Koeman saw his reign as Barca coach get off to a flying start on Sunday when Ansu Fati led them to an easy 4-0 win at home to Villarreal, with all four goals coming before the break.
"With the establishment of the World Athletics Road Running Championships, the whole global community of recreational runners, which numbers in the millions, will be able to come together to celebrate their passion for putting foot to the road."
World champion Xu Jiayu from Zhejiang clinched his second gold in the men's 100m backstroke in 52.60 seconds, after his 200m backstroke victory on Sunday.
Points by Jayson Granger cut the gap to 49-51 in the 24th minute, but Maccabi's Angelo Caloiaro responded with points of his own, leading Maccabi to a 67-58 lead at the end of the third quarter.