In the women's draw, former world no.1 Angelique Kerber, the 15th seed, lost 6-3, 6-1 to the Czech Republic's Katerina Siniakova, who now faces Daria Kasatkina of Russia.
Fresh from his early goal, Salah looked in fine form, and added his second and Liverpool's third when he crashed an unstoppable half-volley past Illan Meslier in the Leeds goal to make it 3-2 to the champions at half-time.
Bayern chairman Karl-Heinz Rummenigge sees BVB as being the club's most dangerous rivals this season. "They have had a much longer break and preparation," the 64-year-old said.
Hoffenheim's wastefulness was punished moments later after Jan Thielmann's long ball into the box found new arrival Sebastian Andersson, who headed home the equalizer against the run of play.
"Over the past two to three weeks, I found it pretty hard to fall asleep and woke up around four or five o'clock in the morning, thinking it over and over again," Lin admitted.
Stage One will be played across two blocks of eight days: September 13-20 and September 28-October 5. Enditem
"Depending on the future direction about the club's sporting and economic ambition, we could only consider working with partners who definitely have proof a connection to the club's identity," Jobst underlined.
Forward Serginho restored Jorge Wilstermann's advantage with a 56th-minute strike but Alves pulled his team level again with a smart finish after combining with Fabio Luciano.
Puig, whose performances were one of the few positives in Barca's disappointing end to last season and who looked as if he was going to play a major role in the new season, was left in the stands for the club's traditional pre-season Joan Gamper friendly against Elche on Saturday night.
Koeman has worked with the majority of the Barca squad for three weeks and said he was content with the work done so far.
"When the years are passing, you are trying to win as much as you can - and when you win, you want to win more. I think this club describes what I am as well; I want to achieve all of the goals, win as many trophies as possible," said the midfielder.