Dimitrov dismissed defending champion Wawrinka, 6-1, 6-2, in a 55-minute thrashing to reach the quarterfinals for the second time.
A focused Monfils rallied from a break down to defeat Federer, 6-4, 7-6 (5). It was the wild card's second straight clay-court win over the world No. 2. Monfils swept Federer, 6-1, 6-4, 6-3, in the Davis Cup final last November.
Monfils Tops Federer, Dimitrov Dismisses Wawrinka in Monte Carlo - Tennis Now
A focused Monfils rallied from a break down to defeat Federer, 6-4, 7-6 (5). It was the wild card's second straight clay-court win over the world No. 2. Monfils swept Federer, 6-1, 6-4, 6-3, in the Davis Cup final last November.
Monfils Tops Federer, Dimitrov Dismisses Wawrinka in Monte Carlo - Tennis Now