Aha! Prost was the master of deception both on and off the track but quite often Senna totally upstaged him - he offered to drive for Williams for free just to upset him (Prost). Of course, when he got his chance for a Williams drive - it was the last move he ever made. Tragic.
Prost also queered the pitched for Nigel Mansell at Ferrari, who was doing a pretty damned good job with a recalcitrant car, ending with Nigel petulantly and symbolically chucking his gloves into the crowd at the British Grand Prix after a gearbox failure - he always blamed Prost for getting inferior equipment after the Professor joined. Later of course, Prost got himself fired by Enzo so it was all for nought really. You will also notice that today, Prost is never invited to ferrari gigs like all the other drivers.
The moral seems to be you should dig 2 holes when trying to bury the opposition - one for yourself. MS would do well to study the history. :squint: