Leicester boss Claudio Ranieri has no problems with Jamie Vardy's pre-match port as long as he continues to impress.

The striker admitted in his new autobiography he drank a glass of port out of a Lucozade bottle the night before every match last season out of superstition.

Vardy also includes three cans of Red Bull and two espressos on the day of a game.

The Italian said: "He took it before Porto? Why didn't he score!?

"A nutritionist gives them something to eat but after they go home they are professional and can eat and drink what they want.

"For me it's important to watch on the pitch, when they play and train well I am happy.

"Sometimes the players do something just because 'ah, I scored a goal and I want to continue'. It's okay. It's the doctor who has to investigate and say the port is good or not good.

"Jamie is doing a fantastic career, from non-league to national team. I don't believe port can do something. It is a glass of red wine. It is okay. For me it is only superstition, nothing more."