A scoreless draw was the result at the Brandywell on Monday night as Derry City and Cork City battled through a tough 90 minutes in the Airtricity League.
Nathan Boyle and Aaron McEneff began the game with some probing runs down the Cork left.
A draw seemed the likely outcome from the early stages of the game. The first half didn't have too much in the way of clear cut chances.
Derry went close after the restart when McNamee fed Patterson on the edge of the box and an interception by Kenny Browne stopped Rory Patterson from testing the keeper.
Patterson hit a good strong shot in the 49th minute just wide of the Cork goal from 30 yards.
Derry were denied a clear penalty in the 76the minute when defender Kenny Browne pushed Patterson in the back as he went to meet a long ball into the box from Josh Daniels.
The chance of the night came two minutes later when Daniels again fed Patterson but the Derry striker skied the shot over the bar from the right edge of the Cork area.
Cork rallied towards the end of the game but they lacked the killer touch to get the ball by the Derry keeper.