After scoring 443 runs as an opener in England's triumphant World Cup campaign, Roy will also have the boost of walking out to bat for his debut Test innings alongside his old school friend turned Surrey captain, Rory Burns.
The pair both attended Whitgift in Surrey, south-east England and Burns told reporters at Lord's on Monday, “You'd be hard-pushed to find a more naturally talented batsman than Jason. Even growing up as a kid you saw Jason hit the ball, strike the ball and do things other kids couldn't do.
“Over the last couple of years, you've seen him rein it in, understand his game a bit more and sort of piece it all together." Burns added: "We have seen what a wonderful player he is. Hopefully, he can keep on doing that and he can translate his white-ball form into red ball.
On the other hand, Australia one-day captain Aaron Finch was well aware of the essentially straight hitter's quality.
“He definitely goes hard having played with him for a few years now for Surrey,” Finch said.
“He's a player that when he's on he can be so damaging to an opposition. But he's got some really good hundreds in county cricket, probably more so in the middle-order. If he gets going on his day, he can be brutal and he can score so quick in all forms of the game, he is a very dangerous threat no doubt,” Finch added.