The number 283 in the world rankings Max Purcell caused a big surprise at Eastbourne International and sent the top seeded Gael Monfils out of the tournament in three sets.
The Australian who is better known for his doubles where he is is number 43 in the world, defeated the French with 6: 4, 5: 7 and 6: 4 and reached the quarterfinals.
Purcell, who defeated his compatriot James Duckworth in the preliminary round, now faces Andreas Seppi by one Place in the last four.
The 23-year-old served nine aces compared to the 16 aces of the number 16 in the world, but turned four breakpoints.
With the victory of the Sydneysiders, compatriot Alex de Minaur (No. .2) the top ranked player in the field.
De Minaur is in action on Thursday when he meets Liam Broady for a place in the quarters.