PARIS—Rafa Nadal barely broke sweat as he continued his quest for a 21st Grand Slam with a brutal 6–3 6–3 6–3 dismantling of Briton Cameron Norrie in the third round of the French Open on Saturday. Nadal, who won a record-extending 13th title at Roland Garros last year, extended his run at the claycourt Grand Slam to an unbelievable 30 sets won in a row. He last dropped a set against Dominic Thiem in the 2019 final and although he was broken twice by world number 45 Norrie in the second set, another straight-sets victory always appeared the most likely outcome. Nadal served out the one-sided contest in a shade over two hours, staying fresh for the toughest part of his campaign. He sent down 35 winners, including three aces, and broke Norrie’s serve six times in the match as he stormed into round four, where he will battle Italy’s …