World number one Novak Djokovic extended his winning run over Tomas Berdych to 10 matches with a straight-sets win at the Miami Open.
The top seed won their quarter-final 6-3 6-3 and will next face Belgian David Goffin.
Djokovic had treatment on his back in the second set, but asked about the issue he told BBC Sport: "No concerns, not at all."
The 28-year-old is trying to win his sixth Miami title and third in a row.
It is three years since Berdych earned one of only two wins over Djokovic in 24 meetings - and again it was the Serb who dominated.