In an age when footballers complain of feeling tired if they play two games a week, how impressive was Novak Djokovic’s achievement in winning the Australian Open at the weekend?
Pushed all the way by Andy Murray on Friday morning, battling for four hours and 50 minutes over five sets, he returned to court two days later and did it all again.
This time he was on for five hours and 53 minutes - for a grand total of 10 hours 43 minutes - as he overcame Rafael Nadal to claim the title.
The standard of tennis was out of the top drawer, it was never less than compelling and he deserves a couple of days off.
The 10 and three-quarter hours of play is the equivalent of a little over seven games of football - or a couple of month’s worth of action for most Premier League players whose managers employ squad rotation.
And I am sure that Djokovic trains as hard as football players when he is preparing to play.
Of course much of the focus in the aftermath of the tournament in this country was Murray’s semi-final defeat.
But after the way he had disappointed in previous Grand Slams when up against the players above him in the rankings, this was promising.
It was his first major under the tutelage of Ivan Lendl who must have been impressed by what he saw.
Murray now looks ready to take the next step - the step Djokovic took a couple of years ago - and it would not surprise me if he won a big one at some stage in the next 11 months.
Least surprising headline of the weekend’s sporting action came from the LV= Cup as Saracens beat Worcester.
Tomkins bags two on Sarries debut was the gist of the story as former Wigan man Joel crossed for a couple of touchdowns as his side came from 14-13 down at the break to win 41-14.
He is going to be a star and England honours surely beckon.
I am just glad that, for the time being at least, league has been able to hold onto his talented brother Sam.
The mid-season transfer window closes at 11pm today and is likely to see clubs scrambling to strengthen their squads ahead of promotion pushes or relegation fights.
I have never been a big fan of the system which can force fees to be inflated as clubs desperate to add to what they have got push the boat out a little too far.
It will be interesting, however, to see if anything happens with former Shay frontman Jamie Vardy on the west coast.
Who knows, this time tomorrow Town could be considerably better off.