By Tom Gott Barcelona president Joan Laporta has admitted that a change in tone from Xavi saw him relieved of his duties towards the end of this past season. Xavi, just one month after performing a U-turn on his decision to step down, was sacked following a disagreement with Laporta over the strength of the squad, with Xavi later challenging the club president to come out and explain the situation publicly. Laporta has now done exactly that, telling in-house network Barca One about the disagreement which led to Xavi’s departure. “Xavi did a good job,” Laporta stressed. “He took over the team a…