Second meets third in the Bundesliga this weekend as Bayer Leverkusen hosts Borussia Dortmund at the BayArena.
Borussia Dortmund captain Mats Hummels says Nuri Sahin's return from long-term injury will aid the finale to the club's Bundesliga season, starting with Sunday's clash against Bayer Leverkusen.
Sahin made his first appearance in almost a year during Dortmund's 2-0 win over Porto in the Europa League on Thursday following long-term knee troubles and lasted 58 minutes as Thomas Tuchel's men claimed a first-leg advantage in the last-32 tie.
Sunday's clash at the BayArena will likely govern who finishes second behind runaway leader Bayern Munich, although third-placed Leverkusen has failed to win any of its last eight Bundesliga home games against Dortmund.