straight to your inboxSpain and Barcelona legend Xaxi Hernandez has urged Manchester City to back Pep Guardiola in the summer transfer market by securing marquee additions.City endured a disappointing campaign last term, finishing 18 points adrift of Liverpool in the Premier League and suffering a Champions League exit at the hands of Lyon.A host of names have been linked with a move to the Etihad Stadium this summer and Xavi believes that three players are needed in particular.However, he's set