There was certainly a lot of excitement building around young striker Mika Biereth at Arsenal last season, who couldn’t stop scoring goals whilst out on loan. In total, Biereth scored 15 goals and provided nine assists in 37 games for both Motherwell and Sturm Graz, making the switch to the Austrian Bundesliga mid-way through the season. Arsenal evidently saw Biereth’s progress in Scottish football and decided there was an opportunity to elevate the 21-year-old, effectively putting him in a more lucrative shop window. And in truth, it worked. Arsenal sold Biereth for £4m this summer, Sturm Gra…