The Romanians host the Blues in the Europa League Round of 16 first leg and Tatarusanu is relishing the test after getting past Dutch giants Ajax via penalties in the last phase.
"Sure, it will be much harder than a game against a top Romanian side - we are talking about 'Europe's queen' - and I have no doubt I will have much more work to do than against a 'normal' European team.
"As we proved in the two games against Ajax, we can be a match for anyone, no matter who they are.
"Before every game - regardless of the competition - I don't feel any pressure on me. All I focus on are positive thoughts, which help me take a serious and professional approach to each match, and be focused for every second."