The Deadline Day business done by both clubs has so far proven inspired.
Depending on who you listen to, Transfer Deadline Day is a bigger villain than the Joker or Dr Evil.
Such is the distaste that is expressed towards clubs being allowed one last chance to improve their squad, you'd think no Deadline Day worked out. Ever.
But West Ham United and Manchester United may just have banished the doubts and critiques this season. For their last-minute transfer business proves the Premier League would be nowhere near as good without the final-day drama.
The Chelsea-owned winger absolutely tore Newcastle United to shreds, before then scoring against Premier League leaders Manchester City this weekend.
United have still overspent on a 19-year-old in Martial, that much is indisputable, even if he scores goals galore.
But that could have happened at any point. The fact is Deadline Day allows Premier League clubs to strengthen having actually assessed their squad in competition. It's a vital component and it allows teams a second chance. That's something that's required in any industry and football can't be an exception for whatever reason, despite those who call for the day to be moved to before the start of a new season.
Many Deadline Day deals go wrong - but only because those conducting them are themselves at fault. West Ham and Manchester United are two examples of how things should be done.