The British number one made a light-hearted remark about tying the knot with his long-term girlfriend on Twitter in response to a question about his wedding plans.
"We are getting married just after Wimbledon, should be a great day," the 26-year-old wrote.
However, he has now said that he was just joking.
"Three things. I don't smoke grass, I'm not getting married (yet) and I don't want to kill Rafael Nadal," he wrote on the social networking website.
Murray has been in a relationship with Sears since 2006.