Grigor Dimitrov defeated Thiago Monteiro 6–3, 6–4 in the first round of the ATP 250 Vienna tournament on hard court. As the pre-match favourite with odds of 1.4, Dimitrov secured a straightforward victory against the Brazilian, who entered at 3.15. The Bulgarian controlled proceedings throughout, winning both sets by a margin of three games to establish early momentum in the tournament. The result keeps Dimitrov on course for a deeper run in Vienna.