Manchester United striker Wayne Rooney has reportedly undergone a second procedure in an attempt to keep his hair from thinning.

The 27-year-old, who had his first hair transplant back in 2011, is believed to have undergone the nine-hour treatment at London's Harley Street Hair Clinic.

Clinic director Nadeem Uddin Khan told The Sun: "He visited us for pre-planned second-stage treatment of his successful transplant. This was scheduled when he began in 2011. It's standard."

Rooney is said to have paid £15,000 for the original procedure two years ago.