Steve Smith’s titanic tussle with Jofra Archer, and the 92mph bouncer that ended their battle in gruesome fashion, dominated the fourth day of a second Ashes Test that is destined for a tense conclusion.

England lost their top order cheaply in the evening session and will begin day five 104 runs ahead on 96 for four, but events at Lord’s will be remembered for an unforgettable, adrenaline-fuelled duel in the afternoon.

Smith was on 80 and progressing towards his third successive century when debutant Archer clattered him in the neck at express pace, brutally flooring the Australian.

The England quick had already struck another nasty blow on Smith’s left forearm during a compelling spell that saw him clock one lightning fast delivery at 96.1mph, showcasing the sport at its most visceral, vital and ultimately violent.

Smith was led from the field but returned just 40 minutes later after passing concussion tests, dismissed softly by Chris Woakes for 92 and looking understandably shaken.

“Today was an ugly incident,” said Australia coach Justin Langer.

“Thankfully, Steve has come through it OK, and hopefully he will continue to have a great series. Because he got another 92 today. What an innings, what a player. And great courage as well, that he came back out.”