Top seeds Rafael Nadal and Roger Federer have booked their spots in the quarterfinal of the ongoing Shanghai Masters after respective wins over Fabio Fognini and Alexandr Dolgopolov.

Spainiard Nadal continued in his quest for a first Shanghai Masters title with a 6-3 6-1 win over Fabio Fognini of Italy in their last 16 clash.

The world number one, 31, will now meet Bulgarian Grigor Dimitrov for a place in the semifinal.

Second seed Roger Federer also progressed to the last eight courtesy a 6-4 6-2 win over unseeded Ukrainian Alexandr Dolgopolov. He will face Frenchman Richard Gasquet in the quarterfinal.

Others through to the last eight include Marin Cilic, who saw off Steve Johnson, and Juan Martin del Potro, who stunned third seed Alexander Zverev.