Arsenal striker Mika Biereth has broke down while on-loan at Motherwell.
Biereth is on a season-long loan at Motherwell.
But he now faces three months out after suffering a knee injury in the League Cup game against St Mirren.
Biereth scored and made an assist in his debut against Hibs last week. He spent last term on-loan with RKC Waalwijk.
