Sunderland beat Norwich City 3-0 in their latest outing.
Kirchhoff has been an influential player for Sunderland since his arrival from Bayern Munich in the January transfer window.
The rangy 25-year-old started out as a centre-back at the Stadium of Light, but he has quickly been moved forward into a defensive midfield position.
Since playing in front of the defence, Kirchhoff has been exceptional - and he has helped Sunderland put in some of their best performances of the season.
Kirchhoff played a vital role as Sunderland picked up a 3-0 victory over Norwich City at the weekend, but he was withdrawn towards the latter end of the contest to be replaced by John O’Shea.
And Allardyce admitted: “Jan is playing very, very well, but even though he completed the previous game, he was still looking very tired.
“We needed to make sure we got some fresh legs on to block off the tricky little players that Norwich have in that position like (Nathan) Redmond and (Wes) Hoolahan.
“You make these decisions and in the end they either go for you or against you, and John was very comfortable in there.”
Allardyce will be hoping that Kirchhoff can fight off any fatigue, as he is likely to play a key part as Sunderland look to avoid the drop.
The Black Cats’ win over Norwich has boosted their survival chances, and they are currently just one point adrift of safety, with a game in hand.
Sunderland’s next fixture comes against Arsenal on Sunday at the Stadium of Light.