A combination of factors makes Norwich City's Sky Bet Championship meeting with Derby County among their toughest this season so far, according to Daniel Farke.
The Canaries go into Saturday's Carrow Road clash at the end of a gruelling week, with a derby win over Ipswich Town followed by a valiant effort at Arsenal in midweek.
Speaking to the press at Colney Training Centre, City's Head Coach said: "The game is probably the most difficult before the international break.
"The load has been incredible this week. Some players played a lot of minutes so we have to think about rotating again.
"We have got a lot of compliments in the past two games. That makes it a dangerous situation because the guys need to focus again.
"Derby have a very experienced squad and are one of the teams fighting for promotion."
Farke says the club's fans can help inject extra energy into tired legs and minds, as he added: "We need our supporters to be patient.
"We need them to be there for is in difficult situations within the game. Hopefully we can win the points but it will be a hard test.
"I expect Derby will concentrate on defending and counter-actions. We need 100 per cent concentation to get the points.
"We're looking forward to it and want to win."