Luke Littler fought back to beat Krzysztof Ratajski and book his spot in the quarter-finals of the Czech Darts Open.
The 19-year-old world champion was trailing 3-1 in the last-16 tie in Prague, but he clicked into gear and reeled off five successive legs to win 6-3.
He threw 180s and found his groove on the doubles to make it six wins from six against Ratajski.
Littler, playing his first European Tour event since March, will next face Danny Noppert later on Sunday as he chases a sixth Euro title.