Roger Federer took his 2017 record to 15 wins from 16 matches as he beat Juan del Potro at the Miami Open on Monday.
The 35-year-old Swiss won 6-3 6-4 in 55 minutes to reach the last 16, where he will face Spanish 14th seed Roberto Agut.
Czech 10th seed Tomas Berdych beat Luxembourg’s Gilles Muller 6-3 6-4 and goes on to play Frenchman Adrian Mannarino.
The News Agency of Nigeria (NAN) reports that Swiss top seed Stan Wawrinka was taking on Tunisian Malek Jaziri later on Monday at the competition.(NAN)