Golfer Justin Thomas is one of many who have expressed their concern, and who hope that Tiger Woods will recover quickly.

- It hurts to see one of his closest friends be in an accident.

I just hope he's fine.

I'm worried about his children, I'm sure it's hard for them, says Thomas in a press conference.

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Golf star about Woods: "I'm worried about his children"

Baseball player Alex A-Rod Rodriguez, former Olympic swimmer Michael Phelps and basketball legend Magic Johnson are also posting their greetings on social media.

“I pray for my brother Tiger Woods as we all wait for more updates.

Thinking of him and his whole family ", writes A-Rod on Twitter.

Former presidents send greetings

Former Presidents Barack Obama and Donald Trump have also spoken out.

In a press release, Trump writes that Woods will recover and that he is a real champion.

On Twitter, Obama writes that he hopes that Woods will recover quickly.

Among other things, he writes "if we have learned anything over the years, it is that we can never count Tiger".