steve evans was unfortunate to be flagged offside from donaldson 's early flick-on while winger demarai gray 's ball into the box from the left was dangerous but uncomplicated attack .
tesche found space just outside the box and after a one-two with donaldson , side-footed coolly into the bottom-right corner to leave martinez with no chance .
shinnie headed cotterill 's excellent cross over in the 38th minute after donaldson 's slight touch beforehand .