Dasaolu admitted it would be an underachievement if he fails to win a medal in the 100 metres final in Zurich on Wednesday evening .
Dasaolu is the second fastest European in history after Linford Christie .
Dasaolu , the second fastest European in history after Linford Christie , admitted it would be an underachievement if he fails to win a medal in the 100 metres final in Zurich on Wednesday evening .