Lewis along with Stones should have done better for the goal today. Lewis should have also done better for the goal against Ipswich...
Having said that I can think of numerous occasions in games this season in which he's done incredible defensive work, It's not an easy role he's asked to play as he spends most of his time in midfield.
He's far from a "poor defender" in my opinion, The lad will only get better defensively as time goes on, He doesn't get enough credit for his one v one defensive work either, He might be small be he's a tough lad. Rico will be our right back for many years to come and deservedly so.