Jofra Archer knocked Alex Carey's helmet off and cut the Australian on the chin with a brutal bouncer.
The England paceman delivered a perfect short ball and the batsman could not get out of the way in time.
It clattered into his jaw, knocking the helmet off but the No 5 had the presence of mind to catch it before it hit the stumps.
The England players showed concern for their opponent and know the kind of damage Archer's express pace can do.
Carey hardly ducked and reared backwards when he realised too late that he could not take evasive action.
Medical staff put a plaster on Carey and he rapidly returned to the crease, seemingly unfazed.
England started superbly against their old rivals in the World Cup semi-final, dismissing dangermen David Warner and Aaron Finch.
Archer bowled with plenty of hostility and kept the batsmen on their toes with his mix of lengths.
The two sides are competing for the right to play New Zealand in the final at Lord's.