Durham retained control over Glamorgan on day two of their LV= Insurance County Championship clash after declaring on 503/8, a lead of 406 runs, before they took two early wickets in the Welsh county's second innings as they finished on 71/2 at the close of play.
Seamer Timm van der Gugten took 3/82 from 27 overs and was the standout bowler for the Welsh county along with Michael Hogan who also picked up three wickets.
"It obviously hasn't gone to plan for the first two days. They've showed us how to bat, bowl and field during this game," said van der Gugten.
"We've got a big day ahead of us on Tuesday, hopefully we can show some character and bat out the entire day.
"It comes down to consistency with the ball. They hammered away for longer and did not ease up.
"We've struggled in that aspect in the first two days, which is disappointing. We've got to try to take the game into a fourth day and hopefully one of the boys can get out there and make a big score."