08/04/2014 07:39 BST | Updated 08/04/2014 07:59 BST

Wayne Rooney Trains With Manchester United Ahead Of Bayern Munich Clash (PICTURES)

Wayne Rooney has trained with Manchester United ahead of their decisive Champions League quarter-final return leg against Bayern Munich.

The England forward is United's main fitness concern ahead of the potentially season-defining clash at the Allianz Arena after missing Saturday's 4-0 win at Newcastle with a toe injury.

Rooney was involved as the United squad underwent a light workout in a session partly open to media at their Carrington training base before flying out to Germany.

wayne rooney

Rooney's fitness was an issue in United's quarter-final with Bayern four years ago

United fought out a 1-1 draw with Bayern in the home leg at Old Trafford.

At Bayern's pre-match press conference in Munich, manager Pep Guardiola was in no doubt that Rooney would line up for the Reds on Wednesday night.

He said: "Rooney is going to play, 100%. He is going to play, I bet you a big, big glass of beer."

Photo galleryWayne Rooney training See Gallery

Guardiola described Rooney as "a big player, one of the best I have seen in my career".

Defender Rafael da Silva, who has been out with a hamstring injury, did not feature and midfielder Marouane Fellaini was another absentee after complaining of dizziness during the weekend win at St James' Park.

Jonny Evans, returning from a calf injury, was involved fresh from playing for the under-21s on Monday.