Republican presidential candidate Donald Trump has said he will accept the result of the US election "if I win".
But he added he reserved the right to file a legal challenge.
His comments came after he refused to promise during the final presidential debate in Las Vegas that he would trust the outcome on November 8th if he loses.
The Republican nominee had told the audience he would keep them "in suspense".
Donald Trump and Hillary Clinton accused each other of being "puppets" as they debated the US's relationship with Russia.
Trump said that he "didn't know [Vladimir] Putin" but claimed the Russian leader had "no respect" for Clinton or President Obama.
Clinton quipped back: "Well, that's because he'd rather have a puppet as president of the United States".
Trump responded: "No puppet. No puppet. You're the puppet".
Donald Trump has refused to say if he would accept the result of the election if he loses, but could he challenge it and what would happen?
During the debate Trump said "bad hombres" needed removing from the US and branded Clinton a "nasty woman". Both sparked jokes on Twitter.
The Republican refused to say whether he will accept the result of the presidential election, saying: "I will look at it at the time."