Scott McDonald will put behind him the two missed chances in the scoreless draw with Hamburg in the Europa League.
The striker was twice thwarted by keeper Frank Rost in the first half when he should have scored.
He said: "I am looking forward to getting the boots back on for Sunday and hopefully putting a few in the net - that's if I play.
"You just never know what's coming, that's just the way it is at the moment.
"Everyone is fighting for a place and there is good competition.
"Marc-Antoine Fortune is back as well so you don't know what the manager is thinking.
"But we have to turn up at Falkirk and have the right attitude.
"Falkirk are a good footballing team and they will make things very difficult for us.
"So it is up to us to show professionalism and get the win."
McDonald thought his name was on the scoresheet when he curled his shot towards the far corner but Rost stretched to parry the ball wide.
The Australian said: "I'm pretty unhappy about it but I won't let it get me down.
"I thought I had scored but you have to give the keeper a bit of credit.
"It does help when you are six foot six, and he got down very well, very quickly.
"You always think you could have done a bit more when you don't score but it's encouraging that we made the chances."