Manchester City became the first side in a decade to retain the Premier League after clinching the title on the final day of the season with victory at Brighton on Sunday. But just how good are Pep Guardiola’s team? How hard is it to retain the league? How does their serial-winning manager rank in the pantheon of great coaches? And will Liverpool be able to recover from the heartbreak of finishing runners-up?Former Manchester United captain Gary Neville, who won eight Premier League titles during his time at Old Trafford, gives us the answers to all those questions… Are Manchester City the best Premier League champions ever? “I think so. There will be people who debate that. But seeing what they have done the last two seasons – last year was a great achievement, but when you win back-to-back titles, amassing the points they have, withstanding that challenge they have had from Liverpool – which was relentless right to the very end, makes them a great side.”Pep Guardiola has come to England and people mention the Champions League, but I would dismiss that… To do what he has done the last two years is unprecedented and incredible. The points tallies is…