MANCHESTER CITY are probably the most successful team in Europe this season in that they won all three domestic trophies on offer. But City did not have the best league record across the continent, that honour arguably belongs to Red Star Belgrade of Serbia and Greece’s PAOK Salonika. In real terms, Red Star, with 33 wins from 37 games, have a win rate of 89.19% which would give them a points haul of 102 (92% of available points). But the Serbian championship is a two-phase affair and the second phase includes the addition of 50% of points from the first. Hence, Red Star have 60 points, but in assessing their success, Red Star are certainly the most prolific team in Europe in 2018-19 and…