Phil Jones has slotted into a back three for Manchester United recently
Under Jose Mourinho, Manchester United have reverted to playing three at the back in recent games.
It paid dividends as they beat Middlesbrough 3-1 on Sunday.
Mourinho has never been afraid to tweak his system.
Jose Mourinho isn't afraid to mix things up a bit
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We have worked on it (back-three tactics) so it is not all that difficult
And Jones insists United aren't fazed about having to adapt to different situations.
“We have worked on it (back-three tactics) so it is not at all that difficult,” Jones said.
“It is all about a willingness to win and fight for each other.
“Whatever formation we play or the tactics we play ultimately it is about the fight in every player and we are showing that at the moment.”
United sit fifth in the table, 17 points behind table-toppers Chelsea.