Thomas Tuchel's Borussia Dortmund are currently fifth in the Bundesliga. Any more slips could put paid to their title ambitions.
Bayern Munich boss Carlo Ancelotti has said that his side must focus on going forward after two draws in the Bundesliga.
Celina is on a season-long loan at Dutch club FC Twente, and the midfielder's performances for the club have sparked Dortmund's interest.
Bayern Munich CEO Karl-Heinz Rummenigge says English clubs' efforts to sign young players verge on "kidknapping."
Carlo Ancelotti paid tribute to his side's "attitude" and "reaction" after Bayern silenced critics with a convincing 4-1 win over PSV Eindhoven.