Novak Djokovic responded to his defeat against Roger Federer by beating Tomas Berdych to set up a semi-final against Rafael Nadal at the ATP World Tour Finals in London.
Federer consigned the world number one to his first indoor defeat in three years on Tuesday, but normal service was resumed two days later as the defending champion won 6-3 7-5 to secure his spot in the last four.
Djokovic finishes runner-up to Federer in Group Stan Smith as he aims to win the season-ending tournament at the O2 Arena for the fourth year in a row, while Berdych bows out after losing all three matches.
Berdych won just one of the first 10 points as Djokovic laid down a marker, but the Serb relinquished his early advantage when he netted to be pegged back at 2-1 and was unable to win three break points in the fourth game.
Underdog Berdych opted not to challenge a call of out when a replay showed his forehand clipped the line and from 30-30 rather than 40-15 he was broken to trail 5-3, allowing Djokovic to serve for the set and seal his place in the semi-finals.
The sixth seed could have been forgiven for downing tools with no more than pride to play for, but he recovered from 2-0 by breaking back with a thunderous forehand to level at 2-2.
Djokovic appeared to be playing within himself, but clearly had no intention of being taken to a third set with a semi-final against a resurgent Nadal to come on Saturday as he went 40-0 up on the Berdych serve and unleashed a forehand winner to break again.
The top seed needed just the one match point to finish off the job and move just two victories away from ending the best year of his career by winning yet another tournament.
Djokovic  bt Berdych  6-3 7-5
Djokovic - 0
Berdych - 10
BREAK POINTS WON
Berdych - 2/2
FIRST SERVE PERCENTAGE
Djokovic - 69
Berdych - 59
PERCENTAGE OF POINTS WON ON FIRST/SECOND SERVE
Djokovic - 66/57
Berdych - 59/71
Djokovic - 70
Berdych - 57