By Ewan Murray Having endured a torrid 2023/24 campaign, Barcelona kick off the new season under new management. Hansi Flick has replaced club legend Xavi Hernandez in the dugout following a successful spell at Bayern Munich and significantly less fruitful stint with the German national team. The 59-year-old has had an entire summer to work with his squad – well, those that haven’t been competing internationally – and will need to make swift improvements on the pitch. Barca’s woeful 3-0 friendly defeat to Monaco won’t have boosted morale before a trip to Valencia this Saturday but the Catalan …