<p class="bodytext">Defending champion Dominic Thiem announced on social media on Wednesday the "tough decision" to pull out of this month's US Open after failing to recover sufficiently from a wrist injury he picked up in Mallorca in June.</p>.<p class="bodytext">The 27-year-old Austrian, who will also miss the remainder of the 2021 season, said he had been making a good recovery before feeling renewed pain last week.</p>.<p class="bodytext">"It has been a tough decision but I know this is what I have to do," he said.</p>.<p class="bodytext">Thiem staged a memorable comeback in New York last year, losing the first two sets in the final before beating Alexander Zverev in five.</p>.<p class="bodytext">The world number six struggled with form after the victory, taking a break from the game before losing his first round match at the French Open when he gave away at two-set lead against Pablo Andujar.</p>.<p class="bodytext">"Unfortunately, I've had to withdraw from the US Open and will miss the rest of the 2021 season," he posted on Twitter.</p>.<p class="bodytext">"I'm really disappointed not to be able to defend the title in New York but I haven't recovered from the wrist injury I suffered back in June at the Mallorca Open."</p>.<p class="bodytext">On Sunday, another former champion Roger Federer also pulled out of the US Open.</p>.<p class="bodytext">The 40-year-old said he needed further knee surgery and admitted he "will be out for many months".</p>
<p class="bodytext">Defending champion Dominic Thiem announced on social media on Wednesday the "tough decision" to pull out of this month's US Open after failing to recover sufficiently from a wrist injury he picked up in Mallorca in June.</p>.<p class="bodytext">The 27-year-old Austrian, who will also miss the remainder of the 2021 season, said he had been making a good recovery before feeling renewed pain last week.</p>.<p class="bodytext">"It has been a tough decision but I know this is what I have to do," he said.</p>.<p class="bodytext">Thiem staged a memorable comeback in New York last year, losing the first two sets in the final before beating Alexander Zverev in five.</p>.<p class="bodytext">The world number six struggled with form after the victory, taking a break from the game before losing his first round match at the French Open when he gave away at two-set lead against Pablo Andujar.</p>.<p class="bodytext">"Unfortunately, I've had to withdraw from the US Open and will miss the rest of the 2021 season," he posted on Twitter.</p>.<p class="bodytext">"I'm really disappointed not to be able to defend the title in New York but I haven't recovered from the wrist injury I suffered back in June at the Mallorca Open."</p>.<p class="bodytext">On Sunday, another former champion Roger Federer also pulled out of the US Open.</p>.<p class="bodytext">The 40-year-old said he needed further knee surgery and admitted he "will be out for many months".</p>