In a surprising upset, top seed Alexander Zverev was ousted from the Mexico Open by German compatriot Daniel Altmaier in a thrilling three-set match. Altmaier’s victory sets up an intriguing second-round clash with Serbia’s Miomir Kecmanovic. Meanwhile, Australian Jordan Thompson’s rollercoaster ride continued as he suffered a first round defeat after clinching his first ATP title just days prior. American qualifier Aleksandar Kovacevic emerged victorious in a hard fought battle against Thompson, advancing to face Holger Rune in the next round. Additionally, Greece’s Stefanos Tsitsipas and Sunday’s Los Cabos Open finalist Casper Ruud secured wins, setting the stage for further exciting matchups in the tournament.