Lucas Leiva's son left confused by shirt in former Liverpool midfielder's collection

Former Liverpool midfielder Lucas Leiva has picked up an impressive set of football shirts during his career - although one in particular left his son baffled. The Brazilian announced his retirement from football on Friday after routine tests at current club Gremio diagnosed him with a heart condition in December. Fan favourite Lucas joined Liverpool from Gremio in 2007 and went on to spend the next decade of his life on Merseyside before sealing a switch to Serie A side …