Granit Xhaka has become the latest person to criticise English referee Michael Oliver after a penalty decision in Bayer Leverkusen’s midweek defeat to Bayern Munich.Photo by Shaun Botterill/Getty

Oliver initially did not punish Roberts for the challenge, later sending him off following a review using a pitchside monitor.

Granit Xhaka expressed his unhappiness with the officiating during Bayer Leverkusen's defeat to Bayern Munich, criticising referee Michael Oliver.

Former Arsenal star Granit Xhaka slammed English referee Michael Oliver following Bayer Leverkusen’s Champions League defeat against Bayern Munich. Two goals from Harry Kane sandwiched a fortuitious Jamal Musiala strike,

Granit Xhaka criticizes referee Michael Oliver for awarding a controversial penalty to Bayern Munich, claiming such decisions wouldn’t be given in the Premier League

Michael Oliver is so biased against Arsenal that he's now giving "soft" decisions against former Gunners players in the Champions League.

Referee Michael Oliver has not been assigned a Premier League match this weekend. Oliver last officiated the FA Cup fifth-round tie between Crystal Palace and Millwall. He failed to stop play after Palace striker Jean-Philippe Mateta was kicked in the head and suffered an injury.

Michael Oliver left former Arsenal midfielder Granit Xhaka furious after a controversial penalty during Bayer Leverkusen's defeat to Bayern Munich on Wednesday.

Amid controversy surrounding Michael Oliver and Granit Xhaka's former club, Arsenal, the midfielder couldn't help but aim dig following 3-0 loss.