Fermanagh manager Rory Gallagher admits "it will be difficult" going into the away dressing room at MacCumhaill Park in Ballybofey tonight.
Gallagher's Ernesiders take on his former Donegal charges in the third round of the Dr McKenna Cup and a win for the visitors will guarantee them a berth in the competition's semi-finals.
It should mark an interesting night for the Enniskillen native who spent the past three seasons in charge of the Tir Chonaill County.
"It will be difficult walking into the away dressing-room but it's the McKenna Cup, it's not the most challenging of environments," Gallagher told BBC Northern Ireland.
On his side's wins over Monaghan and Queen's University so far in 2018, he added: "Like Monaghan, Donegal are an established team in Division 1, albeit they have some good players not available at the minute.
"Both teams will be looking at new players and it will really just be a game for both teams. If we win we are in the semi-finals but at this stage you are looking for good performances."