Even after a lot of Practice why do I perform well in virtual contest but fail to perform well in real contests? . How can I overcome the fear of rating fall , and learn to perform well under pressure ? Does anyone have any suggestions that would help?

I had been giving some virtual contests , and i see i mostly perform well in them , and get a good rank , but in actual contest i almost always end up performing bad , even though i know i could have easily solved those questions if i was not under pressure .

Any suggestions for overcomming this would be really helpful :>