Manchester United face Brodarac in the UEFA Youth League on Wednesday evening (17:30 GMT), with Nicky Butt's Under-19s one step away from the round of 16.
The Reds have participated in events to mark the 60th anniversary of the Busby Babes' final match, in Belgrade, but must be on guard against the Serbian domestic youth champions in unfamiliar surroundings.
The play-off, which must be decided on the night, is being staged at the Stadion Shopping Center in Vozdovac - an enclosed artificial 3G pitch, where the squad trained on Tuesday.
Ro-Shaun Williams is captaining the side, with Angel Gomes and Indy Boonen also in the squad, but there is no Tahith Chong, as the in-form winger is still being treated carefully after his knee operation.