Victory over the Cottagers will guarantee a place in the Premier League's top four with Newcastle sitting a point behind us in fifth.
Our final position will then rest on Arsenal's result at West Brom with the Gunners a point ahead in third going into the weekend.
If we win the Gunners will have to match that at The Hawthorns to stay third.
"We have to get a win ourselves," said Harry. "If we can win the game then we will see what happens.
"If we win we will finish fourth at least, so we just have to try to win what will be a difficult match against Fulham.
"A draw is no good to us and would not help us with Arsenal, so we have to concentrate on picking up three points.
"Fulham are a good team, difficult to beat, so it will be a tough game.
"Arsenal also have a difficult game at West Brom and Newcastle go to Everton, and that's always tough. It's all to play for still.
"After Sunday, we'll all know where we are going."