A Greek teenager upset the odds at the ATP Barcelona tennis tournament on Friday, beating fancied competitor Dominic Thiem.

Nineteen-year-old Athenian Stefanos Tsitsipas produced a mature and composed display to put away the Australian third-seed clay specialist on a 6-3 6-2 scoreline.

Tsitsipas had earlier disposed of seeded Albert Ramos and Diego Schwartzman before dumping out Thiem, a 2017 tournament finalist.

The Greek prodigy is a former Wimbledon Boys Doubles champion, lifting the title in 2016.

Source: John Smith/greekreporter