Everton footballer Aaron Lennon has been detained under the Mental Health Act amid concern for his welfare.
The 30-year-old, who has 21 caps for England, was taken to hospital on Sunday to be assessed after officers were called to a road in Salford.
His club said he was being treated for a "stress-related illness" and his representative urged him to "stay strong".
The footballer last played for Everton as a substitute in the goalless draw at Middlesbrough on February 11.
Greater Manchester Police said: "Police were called at around 4.35pm to reports of a concern for the welfare of a man on Eccles Old Road.
"Officers attended and a 30-year-old man was detained under Section 136 of the Mental Health Act and was taken to hospital for assessment."
Lennon's representative, Base Soccer Agency, tweeted: "Everyone at Base Soccer sends their support to @AaronLennon12 - get well soon and stay strong."
In a statement reported in the Mail, Everton said: "Aaron Lennon is currently receiving care and treatment for a stress-related illness.
"The club is supporting him through this and his family has appealed for privacy at this time."