Germany warmed up for the Qatar World Cup with a laboured 1-0 win in Oman, with debutant Niclas Füllkrug netting the goal in their only pre-tournament friendly on Wednesday. The Werder Bremen forward, 29, scored on 80 minutes for the four-time World Cup winners, who fly to nearby Qatar on Thursday and begin the tournament against Japan in Group E next Wednesday. Timo Werner – the closest player Germany had to a classic number nine – was ruled out of the World Cup with injury and Füllkrug took his chance to show he could lead the line. Coach Hansi Flick also handed a debut to 17-year-old strike…