As our longest-serving player Gary Cahill knows what the required ingredients are to succeed under a new manager, and the defender is expecting the Blues to once again challenge for honours this season with Maurizio Sarri now at the helm. Since arriving at Stamford Bridge in January 2012, Cahill has won every major domestic club trophy and last season, as captain, he lifted the FA Cup at Wembley. His involvement at the World Cup, and England’s run to the final weekend of it, meant he was not back at Cobham until shortly before the start of the season, but in the time since the difference on and off the pitch has been noticeable. ‘There’s a new manager, we’re taking on some new ideas, a new philosophy definitely in shape and in the way he sees things,’ Cahill exclusively told the club’s official app, the 5th Stand. It’s time for us to learn again and adapt to that. To learn somebody else’s opinion on football, the way they want to play and how they want to do things is a...