While Messi continues his recovery from a hamstring injury in his native Argentina, Neymar is suspended after being booked late in a 2-1 La Liga win over Villarreal last weekend.
The absence of the Brazilian is a blow to Barca, with Neymar having scored six goals in his last three matches for the club.
"We will miss him (Neymar). He has settled in really well at the club and he is already very popular," Martino said.
"But we have other forwards who can cause problems for Getafe."
Barca could be three points behind Atletico Madrid by the time their match kicks off on Sunday, with Diego Simeone's side in action against Levante one day earlier.
"Let's see if we can get them this time, it's a good moment for it," Torres said.
"Messi is the best player in the world and Neymar is coming into good form, but it must be said that they have plenty of backup. We will have to play at 150 per cent on Sunday.
"We will have a go. We did it in 2007 (when beating Barca 2-0) and we will give it the best possible shot."
Barcelona have beaten Luis Garcia's men in their last three league meetings, scoring 14 goals in the process.
