Nigeria, Nov. 1 -- Former Germany international Michael Ballack has criticised Bayern Munich's handling of teenage sensation Lennart Karl, accusing the club of mixing concerns about the youngster's public conduct with his development on the pitch. Ballack, who represents Karl, argued that Bayern's recent comments about the youngster risk putting unnecessary pressure on him, particularly at a time when his performances are showing signs of improvement. The former Chelsea midfielder acknowledged that Bayern honorary president Uli Hoeneb was entitled to express his displeasure over Karl's recent public appearance. However, he questioned the decision to make the teenager a subject of public criticism. "It's legitimate for Uli HoeneB to criti...