When you have to go, you have to go. 

And that was the case for Christopher Eubanks on Wednesday as he battled Benjamin Bonzi at the US Open.

The up-and-coming American tennis star was battling an undisclosed illness during his second-round loss with the French wild card, according to the tournament’s official website. 

Eubanks, who fell 7-6 (8-6), 2-6, 6-2, 7-6 (7), was feeling so ill that it began to impact his play and he eventually asked for medical attention during the fourth set.

At one point, Eubanks even asked for nausea medication, the Daily Mail reported.

Despite that, he managed to stay right with Bonzi before eventually conceding a game in the fourth set.

Bonzi served, and Eubanks hit the ball back but immediately jogged off the court and into the locker room for a bathroom break.

Eubanks, per the Daily Mail, was heard prior to the incident talking to the chair umpire to ask if he could forfeit the game in order to use the restroom. 

“If I take a penalty for every point this game, plus a bathroom break, how much time is that? Like just sacrifice this next game to go to the bathroom,” he asked with the fourth set tied 5-5, the Daily Mail reported. 

After a short back-and-forth, the chair ump reportedly said Eubanks would have the whole changeover when the set reached 6-5. 

That’s when he essentially surrendered the game and ran off the court. 

After returning in a new outfit, Eubanks ultimately lost the closely contested match.

In the final set’s tiebreak, he even pulled ahead at one point, 5-4, but ended up losing the tie break, 9-7.

Eubanks dealt with a similar situation in his first-round win on Monday against Soonwoo Kwon when he used the bathroom in the third set, according to the tournament’s site.

For Bonzi, he will next take on Dominic Stricker, who upset No. 7 Stefanos Tsitsipas in a five-set thriller that lasted more than four hours.