Ahead of West Ham's trip to Sevilla David Moyes has admitted the Spanish outfit were the toughest team left in the Europa League draw.
Sevilla are currently second in La Liga eight points behind Real Madrid but seven clear of Barcelona who were also potential European opponents for the Hammers.
Julen Lopetegui's team are the masters of Europe's second-tier tournament having won the competition four of the last six times they have competed in the Europa League.