The Tigers go into the game, set for a 3:30pm [BdST] start on Thursday, eyeing their maiden spot in the final of an ICC event.
"Our plan was always to take it match by match," he said. "I think if everyone approaches the semi-final as just another match, it will be good for the team.
"There will be a lot of hype around this game... but our first task is to stay relaxed and play."
"The wicket looks the same as the one at The Oval," he added. "It could be tough, but the truth is we will have to adjust to playing on it no matter what shape it is in."
Mashrafe also dismissed concerns that the pressure of the occasion could get to his side.
"If you talk about pressure, I think India have more pressure than we have. Because they have huge population and the people love cricket a lot," he said. "Both teams have a lot of expectations."