Arsenal target Pierre-Emerick Aubameyang started for Borussia Dortmund for the first time since 16 December as they drew with Freiburg.
Dortmund have confirmed they are prepared to sell the striker, but only if “certain parameters are fully met”.
Sources close to Dortmund have said Arsenal will need to pay well in excess of £50m to sign Aubameyang.
Jeremy Toljan scored a 93rd-minute equaliser for the hosts to help them climb to fifth in the Bundesliga.
Freiburg’s Nils Petersen had netted either side of a Shinji Kagawa goal for Dortmund.
Aubameyang was suspended by the club for their match against Wolfsburg two weeks ago for missing a team meeting.
Last weekend 28-year-old Gabon forward was left out of the squad for the game at Hertha Berlin because club officials felt he was not focused enough, but he played 90 minutes in the defeat by Freiburg.
“We are ready to realise a transfer under certain parameters but only if these are fully met,” sporting director Michael Zorc told German TV.
“We have a clear position. Arsenal has started several attempts so far. We have up to now refused them all.”