Jamie Carragher has claimed that Pep Guardiola could have a rivalry with one manager in the Premier League. Over the years, Jurgen Klopp is the only coach in England to have well and truly tested the Spaniard over a long period, as he admitted that the competition the German has provided has made him a “better manager.” Jose Mourinho was expected to do so when he was appointed by Manchester United in 2016. But in the 2017/2018 season, the gap between title-winners City and runners-up United was the biggest in terms of points (18) than between the two teams placed first and second in the league…