The Wolfsburg midfielder is reportedly keen to join up with West Ham boss Manuel Pellegrini, who once managed the 28-year-old at Malaga.
Signing him would be excellent for the Irons, who have already had an exceptional transfer window, but such a deal would probably also have positive ramifications for Celtic.
But if Pellegrini can land the one-time Spain international - who joined Wolfsburg for £9 million last summer - then surely a move for the Hoops star makes very little sense.
In truth, West Ham had a slim chance of prising Ntcham from Parkhead anyway without a huge offer, given his importance to Brendan Rodgers's side.
But fans of the Scottish Premiership side can rest easy in the knowledge that it probably won't happen if Pellegrini went and re-signed the powerful midfielder.
United only have five days left in which to bolster their squad and if Ntcham to the London Stadium was a silly rumour to begin with, it definitely won't be happening if West Ham get their Spaniard.