Andres Iniesta has stated that Barcelona must be at their best if they are to beat Manchester City in the Champions League.
The two teams will meet competitively for the first time when they face each other in the last 16 of the tournament, with the first leg taking place in Manchester on February 18.
Barca midfielder Iniesta has acknowledged that Manuel Pellegrini's side will provide a stern test.
"We know Manchester City and they are powerful, especially this season," Sky Sports News quotes Iniesta as saying.
"To defeat the English, it is necessary that we are at our best. We have two hard matches. The danger against City is not only the physical power of English clubs but also the good touchline team with Pellegrini on the bench.
"But we respect the rivals and we are prepared to fight."
Barcelona last won the competition in 2011.
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