This rumour came seemingly out of nowhere towards the end of July, but apparently the Borussia Dortmund star has been quoted as saying hed be interested in joining Celtic this summer. Grokreutz has a soft spot for the club and, with him seemingly out of favour with Dortmund after missing a large part of last season through injury, speculation is now mounting that he may soon join the side he claims to be a huge fan of. Having won a World Cup winners medal in 2014 with Germany and two Bundesliga titles with Dortmund, Grokreutz has shown he can play at the highest level and would certainly be a huge coup for Celtic. With less than 12-months left on his current contract he is another player who would presumably be cheaper than Hartsons quoted figure of £6 million - particularly as Arsenal were linked with a £3.7m bid earlier this year - and, whilst he is primarily a right back, the German international would also provide some much needed competition for Emilio Izaguirres left back position in the team. Likelihood Rating: 6/10