In a cricket tournament there are four teams MI, CSK, RCB & KKR. Each will play each other two times. 2 points is awarded to the wining team, 0 to the losing team & 1 point each if the match is drawn. after league matche first two teams will go through to the final. At the end of the league matches MI get 3 points more than CSK. KKR get 1 point less than MI & RCB get 1 point more than CSK. Atleast how many match(s) definitely ended in draw?