Carlos Alcaraz passed a "test of fire" to breeze into the Madrid Open last 16 with a straight sets victory over Thiago Seyboth Wild on Sunday, while Aryna Sabalenka staved off teenager Robin Montgomery to progress in three sets. Double defending champion Alcaraz came through 6-3, 6-3 and will face last year's runner-up Jan-Lennard Struff in the next round after another impressive showing before adoring fans on home soil. World number three Alcaraz, 20, missed a month prior to Madrid with a forearm issue but returned to crush Alexander Shevchenko in the second round and looks in fine shape ahead of the French Open, the second Grand Slam event of the season.