With Arsenal seemingly out of contention for the Premier League title, the FA Cup is now Arsene Wenger's only hope of silverware after nine years without a trophy and face the current holders on Saturday.
|4/1||Wigan are 4/1 with bet365 to reach the FA Cup final by beating Arsenal|
"We're going to Wembley and we're meeting a top team in the Premier League," Rosler told reporters.
"We are the massive underdog but we have presented ourselves so far in a very, very good way. We've made our supporters proud and we're going to Wembley; we can't lose, we only can win.
"Everybody highlighted the fact Arsenal now really have to go for the FA Cup and win the FA Cup. Their own players said that this week and obviously that puts a little bit of extra pressure on Arsenal."
Arsenal have won three of the past four games between the two teams, including last year's 4-1 league triumph at Emirates Stadium.