Overview
- He left the pitch in the 85th minute of the round-of-16 second leg against Sigma Olmütz with Mainz up 2–0 and a man ahead.
- Da Costa said he felt full-body goosebumps and an urgent need to use the toilet, then asked to be subbed but the bench did not catch it.
- Coach Urs Fischer said he first thought it was unclear, then put it down to cramps and laughed that da Costa tried to return after the visit.
- Kacper Potulski had already come on by the time da Costa came back, which the defender said he had not noticed.
- He later joked that analysts replayed his final minutes with a spotlight in the locker room, and he suggested an electrolyte drink might have triggered the discomfort.