"I am really looking forward to the task and I know what responsibility I have towards the club and its fans. But I am convinced that I can help Schalke and lead the club to where it belongs: namely further up the standings," Baum said during his official presentation.
Roma, Paris Saint-Germain, Ajax, Bayern Munich and Wolverhampton Wanderers have also been linked with the attacker.
Libertad are third, level on points with Caracas FC, but with an inferior goal difference.
Celta held Barca to a 2-2 draw last season, with Iago Aspas netting a late equalizer and the now departed Luis Suarez scoring twice for Barca, so Thursday will be an indication as to how the two teams have evolved in the last three months.
The match between Sinner and Goffin was the first match under the new roof on Court Philippe-Chatrier, as the first day of this year's French Open turned out to be a stormy one.
"We have passed a difficult situation to reach the stage and don't want to lose our chance easily. Our players are highly-motivated for this match and are ready for this tough challenge mentally," he said. Enditem
While the ASEAN automotive industry is clearly on its growth trend, Thailand has strong fundamentals as a leader in this industry and is regarded as one of the world's best location, said Zhang Jiaming, president of GWM ASEAN Operations. Enditem
Midfielder Unai Lopez scored twice as Athletic Club Bilbao won 2-1 away to Eibar.
Instead, the federation will launch a virtual race, to be announced within the next days.
Seventh seed Petra Kvitova of the Czech Republic is also through after she overcame Jasmine Paolini of Italy 6-3, 6-3.
Both Suning and Shenzhen showcased aggressiveness at the beginning of the first half, with Teixeira Santos's header parried by Morteza Pouraliganji in the third minute. Shenzhen's Gao Lin shot to strike back three minutes later but failed to score.