One Sunderland star has been subject of plenty of praise after another ‘solid’ performance against Middlesbrough. Despite plenty of criticism for Sunderland’s style of play and tactics since Michael Beale was appointed, their defence does seem to have firmed up a lot since the 3-0 hammering by Coventry City in his first game in charge. The Black Cats have gone onto pick up two clean sheets and have conceded six goals in their last seven games in the Championship. Despite struggles with injuries at full-back, the team have relied heavily on Dan Ballard and Luke O’Nien in the heart of their defe…