The Pompey boss is calling the next three fixtures spread across eight days a potentially season-defining period for his side, as they face teams in and around them towards the foot of the table.
Charlton are also talking up the importance of the occasion, after four defeats on the spin as they slip down the Championship after their impressive return to the level.
There’s plenty to consider in terms of suspension, form and Pompey’s hunt for the right dynamic and winning formula. Here’s how Pompey writer, Jordan Cross, thinks Mousinho will go at The Valley.

13. Sub 1 Josef Bursik
Ready and waiting to deputise as Schmid's dependable back-up. Photo: Graham Hunt

14. Sub 2 Hayden Matthews
Looks to be ahead of Bowat at present, as he waits for an opening at the back. Photo: Graham Hunt

15. Sub 3 Jordan Williams
Every chance he actually starts this one, depending on how Terry Devlin is utilised. | Paul Phelan/ProSportsImages
16. Sub 4 Luke Le Roux
Could be useful to have on the bench for this one, given the midfield questions. | Simon Roe/ProSportsImages
