Norway's Casper Ruud has been knocked out of the last 16 of the ATP1000 Monte Carlo Masters by Australian Alexei Popirin

<p>Casper Ruud lost to Australia's Alexei Popirin after a nearly three-hour match. The final score was 6-4, 3-6, 7-5. Popirin will play against Alejandro Davidovich Fokina of Spain in the quarterfinals, while another quarterfinal will pit Arthur Fils and Carlos Alcaraz against each other.