Novak Djokovic progresses as Nick Kyrgios knocks Stan Wawrinka out in Madrid

The world number and top seed broke Coric twice in the opening set before breaking in the 10th game of the second set to progress in one hour and 20 minutes.

The 2011 Madrid champion - who has not played at the event over the past two years - will face Spain's Roberto Bautista-Agut in the last 16.

Australian Nick Kyrgios let his tennis do the talking against Stanislas Wawrinka as he knocked the fourth seed out with a scintillating display.

Last year the 20-year-old got a suspended 28-day ban and $25,000 fine after making lurid remarks about Swiss Wawrinka's girlfriend during their match at the Rogers Cup in Montreal.

Kyrgios, who has had several brushes with authority, was widely criticised, but his 7-6(7) 7-6(2) second round victory on Wednesday was further proof of a growing maturity after he won his first ATP title earlier this year in Marseille.

There was the odd outburst at the umpire, one after a first serve during the first-set tiebreak was called out despite appearing to clip the line, but Kyrgios kept his emotions in check to edge a tight tussle.

Japan's Kei Nishikori, the sixth seed, had a narrow escape before joining Kyrgios in the third round.

Italy's Fabio Fognini recovered from losing the opening set to level the match and served for the match at 5-4 in the decider before imploding.

Nishikori won 6-2 3-6 7-5 to set up a meeting with Frenchman Richard Gasquet.

Later on Wednesday top seed and defending champion Novak Djokovic plays Croatian teenager Borna Coric.

6-Kei Nishikori (Japan) beat Fabio Fognini (Italy) 6-2 3-6 7-5

16-Gilles Simon (France) beat Pablo Carreno (Spain) 2-6 6-3 6-4

Nick Kyrgios (Australia) beat 4-Stanislas Wawrinka (Switzerland) 7-6(7) 7-6(2)

15-Roberto Bautista (Spain) beat Feliciano Lopez (Spain) 6-3 5-7 7-5

8-Tomas Berdych (Czech Republic) beat Denis Istomin (Uzbekistan) 6-3 6-3

Pablo Cuevas (Uruguay) beat 13-Gael Monfils (France) 6-7(5) 6-3 7-6(4)

9-David Ferrer (Spain) beat Denis Kudla (U.S.) 6-4 4-6 6-4

1-Novak Djokovic (Serbia) beat Borna Coric (Croatia) 6-2 6-4

Joao Sousa (Portugal) beat Marcel Granollers (Spain) 6-3 6-3

Sam Querrey (U.S.) beat Lucas Pouille (France) 6-7(5) 6-3 6-4

7-Jo-Wilfried Tsonga (France) beat Albert Ramos (Spain) 7-6(6) 5-7 6-4

Jack Sock (U.S.) beat Juan Martin Del Potro (Argentina) 6-4 7-6(2)