Eddie Jones says the selection of Elliot Daly suits the gameplan England have for Saturday's home Test against South Africa.
Wasps back Daly will make his first international start at Twickenham, having been given the nod ahead of Jonathan Joseph at outside centre.
A groin injury hampered Joseph last week, but Jones insists Daly has been selected on merit.
"JJ missed a little bit of training last week, not a great deal, but I just feel that Elliot's a bit sharper at the moment, suits the game plan we want to play and he's done well in the Tests as he's come off the bench," said the England head coach.
"He's a good powerful runner, he's got pace and he's got a burning left foot which could be very useful in the conditions on Saturday.
"JJ is a very good player and will certainly be back in contention to start further down the track."
Jones also explained his decision to pick Tom Wood at openside flanker, in the absence of several injured back-rowers.
"He gives us a good lineout option, he's got a good work-rate and we believe he can stop them on the gain line," the Australian added.
"South African rugby traditionally has been about momentum, it's about big ball-carriers carrying the ball over the line and then playing off the back of that. Given the side they've picked, nothing's changed.
"Tom's got a big role in that area, to stop their ball-runners, make the first breakdown as messy as he can and then work hard after that."
England have not beaten the Boks for 10 years and Jones stated: "We want to change the history of results between England and South Africa over the last period of time and we've prepared for that.
"As you know there's been a lot of injuries, but in reality we haven't given a second thought to those injuries because we've been busily preparing this squad and things are coming together very nicely.
"We're an ambitious team; we want to be the number one team in the world, so this game against South Africa on Saturday is another step forward. We're looking forward to it."