t on target as Sergio Reguilon’s long-range blast was pushed away by Albion keeper Sam Johnstone.
Son saw his strike held by Johnstone moments later, while Bartley made a last-ditch block to deny Reguilon.
Albion still carried a threat and Conor Gallagher smashed a 25-yard strike just wide before Lloris made a superb save to keep out Grant’s header from Krovinovic’s corner.
Mourinho sent on Carlos Vinicius in the closing stages and the striker’s stinging shot drew a good save from Johnstone.
Kane broke Albion’s resistence in the 88th minute when Matt Doherty’s cross caused indecision from Johnstone and the England captain arrived to flick a header into the far corner.