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Derby County pulled off an upset in their FA Cup 3rd round replay with Southampton on Wednesday night as they came back from two down to level before emerging victorious on penalties and, while equaliser Martyn Waghorn - along with his *interesting* celebrations - and decisive penalty scorer, Richard Keogh stole the headlines and Derby hearts, there was an unsung hero in the ranks.

Goalkeeper Kelle Roos, deputising for Scott Carson, made some key saves to keep his side in the game despite it being only his fourth appearance of the season - the former Plymouth man has yet to feature in the Championship, donning the gloves in the Cup and for the development side only.

Carson has been a mainstay in the Derby net since his arrival in 2015 but, after Roos' heroics against the Saints, many Rams fans were calling for the 33-year-old to be dropped for the league clash against Reading this weekend. Given the service Carson has given Derby over the years, it would be a bold call for Frank Lampard to make but it may be worth it.

You can find the best of the reaction on Twitter below...

Playmaker FC's Matchday With Max was at the East Midlands Derby in December. Check out Forest and Derby fans thoughts on their respective managers in the video above...