World number one Alcaraz reaches last 16 in Miami

Carlos Alcaraz beat Daniil Medvedev in last week's Indian Wells final to return to world number one

World number one Carlos Alcaraz cruised into the last 16 of the Miami Open with victory over Dusan Lajovic.

Alcaraz, who has won 16 of 17 matches this year and has not dropped a set in his past two tournaments, needs to win the title to stay top of the rankings.

Norwegian third seed Casper Ruud is out after a 3-6 6-4 6-4 defeat by Dutchman Botic van de Zandschulp.

After a number of upsets on Saturday, there were straightforward wins for men's seeds Andrey Rublev, Holger Rune and Taylor Fritz.

Russian sixth seed Rublev beat Serbia's Miomir Kecmanovic 6-1 6-2, while Rune, the seventh seed from Denmark, won 6-4 6-2 against Diego Schwartzman of Argentina.

Rune will play Fritz in the next round after the American ninth seed beat Canadian Denis Shapovalov 6-4 6-4.

Fourth seed Daniil Medvedev progressed without playing, after opponent Alex Molcan withdrew from the tournament.

In the women's draw, Swiss ninth seed Belinda Bencic was beaten 7-6 (10-8) 6-3 by 18th seed Ekaterina Alexandrova.

Alexandrova will face Bianca Andreescu in the fourth round following the Canadian's 6-4 6-4 win over Sofia Kenin.

Australian Open winner Aryna Sabalenkadefeated Marie Bouzkova 6-1 6-2 and next plays Barbora Krejcikova, who beat Madison Keys 7-6 (7-4) 6-3.

Meanwhile, Wimbledon champion Elena Ryabkina edged out Paula Badosa 3-6 7-5 6-3, but Czech 17th seed Karolina Pliskova lost 6-1 6-2 to compatriot Marketa Vondrousova.

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