It would take a brave man to pick a fight with Roy Keane, and nobody could quarrel with his view of Liverpool’s Scotland fullback Andy Robertson after a skirmish at Anfield. Robertson appeared to be feebly elbowed in the face as he approached linesman Constantine Hatzidakis at half time. The Scotland captain reacted in the traditional way, as if he had been waterboarded. Keane’s view was as ever imperious: ‘You know what he is that Robertson? I’ve watched him a number of times – he’s a big baby.’

Anyone who has ever seen Liver-pool should be all in favour of referees’ assistants sticking one on Robertson every now and again. Karma or what! All that verbal abuse, finger–wagging and head-shaking over every manifestly correct throw-in decision. Hatzidakis now appears to have been stood down while some investigation into the incident trundles on.

Someone should knock up a ‘Je Suis Constantine’ T-shirt: really, if a linesman can’t smack Andy Robertson for getting handsy and lippy, then the game has gone. Keano was spot on. And the harassment, physical and verbal, of officials at football matches across all levels of the game and increasingly all age groups is a growing source of shame.

But for real fun and games you need look no further than Stamford Bridge. This is how Chelsea’s own commentator on Chelsea’s own website introduced the highlights of last weekend’s abysmal performance at Wolverhampton: ‘Wolves welcome Planet Football’s most fascinating, surprising and wonderfully bonkers football club.’ So I guess we can assume that ‘wonderfully bonkers’ is now the official company line. Cartoon fun! That crazy guy Todd! Changing managers – that’s our business! Meanwhile, the fact is that Raheem Sterling has now had more managers in a week at Chelsea (three: Graham Potter, stand-in Bruno Saltor and Frank Lampard) than he had in seven years at Manchester City.

Rugby’s elite stamped their authority on the game with some superb European Champions’ Cup quarter-finals. Brave little Exeter are the only English team in the last four and that is a triumph in itself. English clubs are subject to a salary cap and the threat (if anyone can ever make their mind up) of relegation. French clubs have no salary cap and the Top 14 is probably the best rugby league in the world, if not one of the best leagues of any sport anywhere in the world: competitive, entertaining, wealthy and glamorous. This could be the last year an English side makes it to the last four unless something changes very soon.

Exeter will now be up against the overwhelming power of La Rochelle, a bunch of very substantial units who give every appearance of being happy to demolish a skyscraper, let alone an opposing scrum. In the other semi, Leinster (who are basically Ireland) take on Toulouse, French rugby royalty and blessed with a glittering array of players, not least the best in the world, their captain Antoine Dupont, whose blistering skills make a brutal physical game like rugby into a thing of rare beauty. Unless you have Irish blood in your veins, you should be rooting for a Toulouse victory.

Plenty has been written about the great Dick Fosbury, who died last month, but it’s worth remembering just how revolutionary the gangly high-jumper was. There is no equivalent of one person changing how a sport operates the way he did with his ‘Fosbury flop’. It’s like Jimmy Anderson suddenly deciding to run up to the crease backwards – and then every other bowler in the world following suit for ever. His Olympic career was short-lived – after winning gold in the 1968 Olympics in Mexico, he failed to qualify for Munich in 1972 – but his influence will never die.