Ralph Hasenhuttl will hand Willy Caballero his Southampton debut at Arsenal after getting the former Manchester City and Chelsea goalkeeper up to speed with video clips of how his team plays.
Caballero, 40, who had been training with AFC Wimbledon to sustain his fitness since leaving Chelsea in the summer, signed a short-term contract on Monday with Saints goalkeepers Alex McCarthy and Fraser Forster both sidelined by injury.
Harry Lewis was on the bench for last weekend's 1-1 draw with Brighton, but the 23-year-old academy graduate has yet to make his Premier League debut.