MILAN (Reuters) – Shares in Juventus tumbled some 10% on Monday after Italian soccer authorities docked the club 15 points for its transfer dealings, in a blow to its reputation and short-term sporting prospects. Juventus, who have won the Italian league more times than any other club, are now 9th in the Serie A standings and face an uphill struggle to qualify for lucrative European competition. Juventus drew 3-3 with Atalanta on Sunday night in their home city of Turin in their first game since the punishment was announced late on Friday. The club said it would await the reasons for the decis…