Castillo has enjoyed a fine start to the season for Olympiakos, netting four goals in three games and Chelsea are keen to keep tabs on the youngster.

• 卡斯蒂略本赛季有个完美的开局，他为奥林匹亚打三场比赛进了4球，蓝军正在努力的追逐这位年轻的新星。