Rafael Nadal booked his place in the quarter-finals of the French Open after defeating Kei Nishikori 6-4, 6-1, 6-3 in Paris.
The victory over the Japanese 13th seed was Nadal's second straight sets win in succession as he edged closer to an unprecedented eighth Paris title.
Nishikori only troubled Nadal, who was celebrating his 27th birthday, in the first set as he looked to become only the second Japanese man to reach the last eight of the French Open.
Nadal broke serve in the fifth game of the opener which was enough for him to take the first set before Nishikori earned a break point in the second game of set two, but failed to convert.
It was then broken in the next game when he hit a backhand volley into the tramlines, signalling the point when defending champion Nadal seized control.
The third seed secured the win with a forehand shot down the line in just over two hours, to set up a quarter-final clash with either Richard Gasquet or Stanislas Warwinka on Monday.
The crowd sang 'Happy Birthday' to Nadal before a huge cake was wheeled onto the court.
Nadal said: "To celebrate my birthday here on centre court in Paris is a very special moment for me.
"Today I played a bit better than in the previous days."