Katie Boulter upset last year's runner-up Karolina Pliskova to reach the third round of a grand slam for the first time at Wimbledon on Thursday.
Boulter has been blighted by injuries but broke new ground in her home major with a 3-6 7-6 (7-4) 6-4 defeat of the sixth seed on Centre Court.
The 25-year-old beat Pliskova on the grass at Eastbourne last week and got the better of the Czech once again, hitting 25 winners and breaking the former world number one four times.
Boulter, ranked 118th in the world, dedicated a huge victory to her grandmother, who passed away on Tuesday.
She will face Frenchwoman Harmony Tan, conqueror of Serena Williams, for a place in round four at the All England Club.
Boulter became only the sixth female British wildcard to progress beyond the second round of the grass-court major at SW19.