组首名和最佳第二名晋级第二轮。（比较最佳第二名时不会计入与小组第四名的比赛纪录）
抽签.The draw for the preliminary round was held on 19 January 2017, 13:30CET(), at the UEFA headquarters in Nyon, Switzerland.The 16 teams were allocated into four seeding positions according to their