Former finalist Tomas Berdych powered into the fourth round of the Miami Open presented by Itaú on Monday as he defeated Gilles Muller 6-3, 6-4.

The 10^th-seeded Czech won 76 per cent of his service points and converted two of his four break point chances to wrap up victory in 84 minutes, avenging the defeat he suffered to Muller in Tokyo last year.

The 31-year-old Berdych was runner-up at this ATP World Tour Masters 1000 tournament in 2010, losing out to Andy Roddick. He has also reached the semi-finals on three further occasions. The right-hander goes on to face either #NextGenATP star Borna Coric or Adrian Mannarino.

Roger Federer is in action later. The Swiss faces Juan Martin del Potro in a blockbuster third-round clash. 

 Watch Full Match Replays

View FedEx ATP Head2Head for the following match-ups & vote for the players you think will win!
Federer vs del Potro | Kyrgios vs Karlovic | Isner vs Zverev 

• DAY 6 PREVIEW: Third round action on Monday at the Miami Open, presented by Itau, continues with both Swiss superstars in Stadium court action. No. 1 Stan Wawrinka and No. 4 Roger Federer are the only remaining Emirates top-ten players in the top half of the draw. Two more top-ten seeds are in action today—No. 8 David Goffin and No. 10 Tomas Berdych—along with U.S. stars No. 18 John Isner and No. 22 Sam Querrey.

In the opening men’s match on Stadium, Federer squares off against long-time rival No. 29 seed Juan Martin del Potro. The pair has played twenty times, but this is their first meeting since the 2013 Barclays ATP World Tour finals, where Federer defeated the Argentine in round-robin play. Del Potro has won three of the last five encounters, but the Swiss has emerged victorious all five times the pair has met at Masters 1000 series events.

In the last day session match, Isner will try to exact revenge on German #NextGen star Alexander Zverev, who beat him last fall in Shanghai, their only previous meeting. Isner reached the semi-finals here two years ago (l. to Djokovic), while Zverev is charting new territory, playing in the Miami third round for the first time.

In the evening session, Wawrinka will take on Tunisian Malek Jaziri, who ousted No. 31 seed Lopez on Saturday. Jaziri is looking for his first-ever victory against an Emirates top-ten opponent (0-9), and is facing the Swiss for the first time. Wawrinka is playing his first Masters-level event as the top seed, and is aiming to reach the quarter-finals in order to top his previous best showing here (2009, 2014 4th round).

On Grandstand, 2010 finalist Berdych takes on No. 24 Gilles Muller in their second career encounter. Muller beat the Czech last fall in Tokyo. Next up, Querrey goes for the upset against No. 14 Roberto Bautista Agut, who has defeated him twice in the past. The third men’s match is sure to be a big-serving clash between No. 12 Nick Kyrgios and No. 17 Ivo Karlovic. The Australian has won both previous encounters. Closing the day’s Grandstand action is Goffin against Diego Schwartzman, the No. 2 ranked Argentine, who upset Ferrer on Saturday. The head-to-head is knotted at one, and Schwartzman won the last match, in last year’s Antwerp semi-finals.

On Court 1, #NextGen Croat Borna Coric faces the French left-hander Adrian Mannarino, both of whom hold a losing record on the season. Each player needed to score an upset to reach the round of 32: Coric ousted No. 6 seed Thiem, and Mannarino surprised No. 32 Lorenzi. Mannarino reached the 4th round here in 2015 (d. Wawrinka, l. to Thiem), while Coric is making his first third-round appearance.

View Full Media Notes

Jack Sock recorded yet another win this season on Sunday at the Miami Open presented by Itau, fighting hard under the lights to defeat Jiri Vesely 6-3, 7-6(0) and reach the round of 16.

A single break of serve was all the 13^th seed needed to take the opening set. Vesely raced to a 5-3 lead in the second set, but Sock fought back to level the match and was dominant throughout the tie-break. A volley winner on his first match point wrapped up the contest after one hour and 39 minutes. Sock improves his FedEx ATP Head2Head record against Vesely to 2-0.

 Watch Full Match Replays

The American moves to 9-2 in tie-breaks this season. He also boosts his win-loss record to 17-3, tying Grigor Dimitrov, Jo-Wilfried Tsonga and Dominic Thiem for most match wins this season.

Next up for Sock is #NextGenATP American Jared Donaldson, who moved into the fourth round when third seed Milos Raonic withdrew before taking the court due to a hamstring injury.

Fourth seeds Jamie Murray and Bruno Soares sailed into the quarter-finals on Sunday at the Miami Open presented by Itau, recording a dominant 6-0, 6-3 win over Paolo Lorenzi and Joao Sousa. 

Murray/Soares have dropped just 10 games in their first two matches this tournament. Next up for them are either sixth seeds Lukasz Kubot and Marcelo Melo or Jean-Julien Rojer and Horia Tecau.

 Watch Full Match Replays

Bob Bryan and Mike Bryan moved closer to their fifth title in Miami with a 6-3, 6-4 win over Australian wildcards Nick Kyrgios and Matt Reid. The third seeds didn’t face a break point en route to claiming victory in 52 minutes. They’ll next play Croatians Marin Cilic and Nikola Mektic, who defeated Americans John Isner and Steve Johnson 7-5, 6-3.

Seventh seeds Ivan Dodig and Marcel Granollers prevailed in a hard-fought second-round tussle over Gilles Muller and Sam Querrey 6-4, 6-7(5), 10-6. Awaiting them in the last eight will be top seeds Henri Kontinen and John Peers or Americans Nicholas Monroe and Jack Sock.

Philipp Petzschner and Alexander Peya also reached the quarter-finals by rallying to defeat Alexander Zverev and Mischa Zverev 4-6, 6-4, 10-8. They’ll play either second seeds and defending champions Pierre-Hugues Herbert and Nicolas Mahut or the new combination of Brian Baker and Daniel Nestor.