Portsmouth manager Steve Cotterill saluted a "big win" for his side after they sunk high-flying Norwich 2-0.
Pompey won at Carrow Road for the first time in 23 years courtesy of second-half goals from Dave Kitson and Greg Halford's penalty, as well as a string of fine saves from goalkeeper Jamie Ashdown.
Cotterill said: "This was a really big win for us. I saw Norwich last week at Derby so I knew we would be up against a very good side.
"The lads showed a lot of character out there, epitomised by Jamie Ashdown who had only just recovered from an appendix operation but was determined to go out there and do his bit, which he did by making some really good saves.
"We were under a lot of pressure, especially in the first half but I thought the back four defended really well and we didn't allow them too many sights of goal."