Bayern Munich defender Niklas Sule insisted he will "give everything" to ensure Borussia Dortmund finish second in the Bundesliga this season, despite agreeing to join Marco Rose's side in 2022-23.
Sule has agreed to join Dortmund when his deal expires at the Allianz Arena in June, but Julian Nagelsmann has repeatedly assured that the centre-back remains committed to the cause.
That was evident when Sule opened the scoring against Bayer Leverkusen on Saturday, although the reigning Bundesliga champions had to settle for a 1-1 draw after Thomas Muller's own-goal.
The 26-year-old was a standout performer against Gerardo Seoane's side, completing a game-high 99 successful passes, with no player attempting more in the opposition half (53).
While Bayern missed the chance to go 11 points clear at the Bundesliga summit, Sule expressed his commitment to Nagelsmann's side with his focus solely on domestic and Champions League success this term before joining Dortmund.
"I'm nothing but grateful. I'll give everything for this club until the last day, hopefully with two more titles," Sule told Sky Deutschland, as quoted by BILD.
"I believe in that. I'm grateful for the way people here are coping with my decision.
"I deliberately haven't spoken out yet. I'm still a Bayern player. There are still two big titles to play for and I will give everything to make sure Dortmund finish second this season."
The Bavarian giants sit nine points clear at the top, with second-placed Dortmund boasting a game in hand but they are not in action next until March 13.
But Nagelsmann was disappointed with his team's outing as he acknowledged Leverkusen squandered as many presentable opportunities as Bayern.
"The first half an hour was very good," he told reporters. "We had a lot of control and missed the second goal. We had chances. The goal we conceded was avoidable. The communication between Thomas [Muller] and Sven [Ulreich] was there, but I think it was too quiet.
"We were lucky not to concede a second. In the second half, Leverkusen defended deep. They had three good chances on the counter.
"The final touch was missing for us. I think in the end a point was fair for both teams, even though, of course, both wanted to win."
Bayern will look to make amends in the league when they visit Hoffenheim in a week's time, after Nagelsmann's men host Salzburg on Tuesday in the return leg of their Champions League last-16 clash, which is finely poised at 1-1.