Robert Lewandowski started pre-season training at Bayern Munich on Wednesday amid a report that Barcelona believe they can sign the World Footballer of the Year before the end of the week. Lewandowski, 33, had his first training unit the day after undergoing fitness tests in Munich. He was the last man out and spent long parts of the session away from team-mates although he briefly chatted with midfielder Leon Goretzka and members of the coaching staff. Captain Manuel Neuer, Benjamin Pavard, Leroy Sané and Lucas Hernández were the other final Munich players back in training after their holiday…