Jim O'Brien gave the home side the lead in just the fourth minute . Tom Pope leveled for the visitors six minutes later before half-time . Minutes later Port Vale took the lead through Mark Marshall . Substitute Sanmi Odelusi drew Coventry level with 20 minutes left . Michael O'Connor gave Vale the lead again though five minutes .
Jim O'Brien gave the home side the lead in just the fourth minute . Tom Pope leveled for the visitors five minutes before half-time . Minutes later Port Vale took the lead through Mark Marshall . Substitute Sanmi Odelusi drew Coventry level with 20 minutes left . Michael O'Connor gave Vale the lead again though six minutes later .