West Brom hammer non-League Chesterfield in FA Cup third-round replay; Baggies set up fourth-round tie at fellow Championship side Bristol City, who defeated Swansea in extra-time; Birmingham avoided a shock at League One Forest Green; Luton win dramatically in stoppage-time at Wigan.
West Brom ruthlessly exposed the 70-place gap between themselves and National League Chesterfield as they won their FA Cup third-round replay 4-0 at The Hawthorns.
John Swift scored the first goal then had a hand in the next two from Tom Rogic and Jake Livermore before substitute Jovan Malcolm headed the fourth.
