Jan 10 (Reuters) - Real Madrid could ‌unleash their biggest weapon in Sunday's Spanish Super Cup final against Barcelona, ‌with coach Xabi Alonso saying they are considering taking a risk ‌on Kylian Mbappe's fitness after he missed the semi-final.

Mbappe, who matched Cristiano Ronaldo's club record of 59 goals in a calendar year during Real's 2-0 LaLiga win over Sevilla last month, is nursing a ‍knee injury.