• Brazilian striker to fly to London overnight for medical• 26-year-old has not played a competitive game since NovemberAlexandre Pato is to fly to London overnight to finalise a six-month loan deal with Chelsea after the move was sanctioned by his current club, Corinthians, with the Brazil forward hoping his form convinces the Premier League club to make the move permanent in the summer.The striker, who boasts 27 caps and enjoyed a productive six-year spell with Milan earlier in his career, has not played a competitive game since November when he returned from a two-season loan stint with Sao Paulo and will undergo medical tests in England.