Sturm Graz boss Jurgen Saumel believes Rangers should expect their players to step up their performances after the amount of investment in the squad.

The Govan club have spent a reported £20million on refurbishing Russell Martin’s squad but their start to the season has been so alarming that the vast majority of fans have firmly turned on the former Southampton boss.

The Light Blues boss was again targeted by frustrated supporters despite beating Livingston 2-1 in West Lothian with a dramatic late winner on Sunday for their first William Hill Premiership victory of the season.

Rangers are eighth in the league with seven points – nine behind Hearts and seven behind Old Firm rivals Celtic – and were knocked out of the Champions League play-off by Club Brugge with a humiliating 9-1 aggregate defeat.

Speaking with the help of an interpreter at the Merkur Arena ahead of their Europa League clash on Thursday night, Saumel over-egged Rangers’ spending as he gave his analysis of the Light Blues but was keen to stress the “serious” money spent.

He said: “Obviously there have been a lot of new players coming into the team.

“They have spent a serious amount of money on the squad and it is to...