Barcelona's players will start the new season tomorrow with El Clasico against Real Madrid under the Super Cup of Spain. Barcelona behind them had pretty successful preparations in which they did not lose, but the competitive game against the rival rival is quite something else. Ernesto Valverde in official matches on
Borussia Dortmund, Arsenal and PSG among others were off colour - but Barcelona disappointed more than anyone else in 2016-17. 2016-17 wasn't a vintage season for several high European clubs generally. The Manchester clubs were out of the title race by March. PSG lost out on the Ligue 1 title to AS Monaco when four productive seasons. Bayern Munich, despite their domestic success, didn't crack the eu code over again.