Celtic will be on the hunt for new arrivals this summer as Brendan Rodgers looks to strengthen the ranks at Parkhead. For now, the Scottish Cup final is set to take precedence before everyone at the club takes a well-earned rest ahead of pre-season; meanwhile, some players will also head off to feature for their respective nations on international duty. Over the coming weeks, speculation over transfers is bound to ramp up, with plenty of excitement regarding who could come in to bolster Rodgers’ side in several positions. Now, John Hartson has weighed in on Celtic’s potential activity, opining…