Derby County moved to within two points of the Championship play-off places with a hard-fought victory at lowly Charlton Athletic.

An own goal from Macaulay Gillesphey handed the Rams a half-time lead before Bobby Clark doubled the advantage after an hour.

Charlton responded through Tyreece Campbell's long-range strike, but could not find an equaliser despite late pressure and a man advantage with Derby defender Matt Clarke receiving a second yellow card late on.

It is now consecutive league wins for John Eustace's side as they climb to 10th in the table, while Charlton remain four points above the relegation zone.

Derby striker Patrick Agyemang revealed after the Rams' 1-0 win at Preston North End on Saturday how upset he was missing an open goal despite eventually scoring the winner at Deepdale.

The USA international was crucial to the visitors' opener he drove into the six-yard box from the left and fizzed in a shot which forced the unfortunate Gillesphey to turn the ball into his own net.

Derby still remained the more threatening side before the interval, with Agyemang's fellow forwards Ben Brereton Diaz and Corey Blackett-Taylor both going close.

Charlton manager Nathan Jones made two changes at the break, but the Addicks were caught out again as this time Clark raced through to finish clinically past Thomas Kaminski from Brereton Diaz's through ball.

Campbell reignited home hopes however with a fierce effort from distance that flew in off the post and gave Richard O'Donnell no chance.

Derby were reduced to 10 men for the last few minutes as Clarke was given a second booking for a poor tackle on Kayne Ramsay.

It set up a nervy ending but the visitors defended resolutely to see out a valuable away win and close the gap to the top six.

Charlton Athletic manager Nathan Jones told BBC Radio London:

"I'm disappointed because I felt the goals were avoidable. If the goals were avoidable and we have the second-half performance like we did, then that's what we want to do and what we've been doing.

"But of late, we've struggled to keep clean sheets and struggled to defend how we normally defend, and that's cost us because you can't chase Championship games two-nil down.

"There's a lot of endeavour. We moved the ball first half without really having enough purpose, but Derby came with a game plan and sat in. It was very difficult."

Derby County head coach John Eustace told BBC Radio Derby:

"I thought he [Richard O'Donnell] was excellent, full credit to him and the goalkeeping department.

"We've got four really good goalkeepers who are developing and learning all the time. The way they work, the way they drive the standards in training as a unit whenever any of them are called upon they certainly don't let us down.

"I'm delighted for Richard tonight because he's worked his socks off throughout the season without getting an opportunity.

"Tonight was his opportunity and I thought he was excellent."