Celtic assistant manager Johan Mjallby wants to keep adding to the pressure on hosts Benfica ahead of Tuesday night's Champions League encounter in Lisbon. Celtic are two points behind Barcelona, who lost 2-1 at Parkhead earlier in the month. Benfica are in third place on four points while Spartak Moscow are bottom with three. A win on Wednesday would guarantee Celtic progressing to the knockout stages while eliminating the Portuguese side. A score draw would also be enough if section leaders Barcelona beat Spartak Moscow. Ahead of flying to Portugal, Mjallby said: "We are in a great position. There is more pressure on Benfica because they really need to win the game. But it is a difficult game, it's a Champions League match away from home and we really respect Benfica, we think they are a really good side. But the confidence is there, we have shown that we can play away from home so why not go out and nick that vital point? They are probably going to go all out and win the game and they are going to be strong at home, a good side going forward, well organised but at the end of the day we have picked up a lot of confidence from our away games and we know that if we defend really well we can get something from this game. Scott Brown and Gary Hooper are back in contention and Kris Commons and Georgios Samaras seem to be okay. Joe Ledley and Miku are back in contention and we have to wait to see how they are tonight when we train."