Novak Djokovic and Rafael Nadal qualified for the quarter-finals of the Italian Open Tennis Tournament.

Djokovic battled to a straight-sets win over Filip Krajinovic to move into top eight for the 14th year in a row.

Djokovic saved five break points on his way to a 7-6 6-3 win over his fellow Serb in a match lasting over two hours.

The world number one will play Dominik Koepfer of Germany, who beat Italian Lorenzo Musetti 6-4 6-0, in the last eight.

Also defending champion Rafael Nadal cruised past Dusan Lajovic 6-1 6-3.

Nadal will face argentine Diego Schwartzman in the last eight and has won all nine of their previous meetings.