However, they lost in both singles and doubles, which allowed Switzerland to win the tournament. That same year, Alcaraz also won the Lacoste Invitational tournament in London, a Masters event for players under 14. In 2018, Alcaraz returned to the ITF junior circuit and continued to play consistently. He won his first tournament in Grade 2 in Castricum in July. In September, he won the Junior Davis Cup in Budapest, defeating France in the final. His victories in singles and doubles helped Spain win the challenge 2–1 and lift the trophy for the sixth time. In 2019, Alcaraz won the Grade 1 tournament in Villena and competed at Roland Garros, where he lost in the first round. He reached the quarterfinals at Wimbledon. The London tournament marked his last junior engagement before focusing exclusively on his professional career.
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