Celtic need to bring a new left-back to the club this summer with no competition or depth currently in place for established regular Greg Taylor. Right now, the untested Academy graduate Matthew Anderson is Taylor’s principal backup, which is far from an ideal situation when Brendan Rodgers is calling for proven quality to join the squad. One of the primary transfer links in the position over the last eight months has been Hugo Bueno. The Wolves defender was first reported to be interesting to Celtic back in January with a late loan bid for the player booted out. Then, further reports emerged …