Alexis Sanchez - Spotlight on
Sanchez has been a rich vein of form as of late, netting six times in his last three Premier League outings.
Arsenal have gone from strength to strength in recent weeks and currently sit in second spot in the table.
And Henry is in no doubt that Sanchez could make all the difference insofar as the Gunners’ challenge for the title goes.
“I've said it so many times, but he's vital for Arsenal," Henry told Sky Sports News.
"If he's fit I think Arsenal have a chance of winning the Premier League.
"If he stays injury-free and shows the desire and the commitment that he has for Arsenal in the way he plays then Arsenal have every chance of winning the title, but you need to keep that guy fit.
"He is that 'extra' type of guy that, when you're in trouble, he'll make sure you win the game. I don't want to copy a show on another channel, but he is the 'X-factor'."
Next up for Arsenal is a trip away to Swansea on Saturday (3pm).