Among the matches of Delhi Daredevils in 2014, how many won matches are there?
Delhi Daredevils refers to team_name = 'Delhi Daredevils'; in 2014 refers to Match_Date contains '2014';
SELECT COUNT(T1.Match_Winner) FROM `Match` AS T1 INNER JOIN Team AS T2 ON T2.Team_Id = T1.Team_1 OR T2.Team_Id = T1.Team_2 WHERE T2.team_name = 'Delhi Daredevils' AND T1.Match_Date LIKE '2014%'