By the way, I don't see Mr. Lendl's departure as a big deal.
Hopefully Andy Murray doesn't dwell on it.
Andy learned all he could from him and used it well.
And Andy did something Mr. Lendl wasn't able to do - win Wimbledon, though to be fair, the grass competition was brutal in Lendl's day and the grass much faster, certainly not fitting to the style of Lendl's game - power baseline player.
Andy only needs to remember all Ivan imparted to him and move on.
Respectfully,
masterclass