Posh were deserved winners against their National League opponents, but they made life a lot harder for themselves than they needed to.
Dover were in the game until the final 10 minutes, partly due to their own endeavour, but also down to some wasteful finishing from Darren Ferguson's men.
Here's how the Posh players rated...
1. Christy Pym... 6
Didn't have too much to do, but when he was called into action he reacted well. Safe handling all game
2. Nathan Thompson... 6
A solid enough defensive performance, but the right-back didn't get involved enough going forward. Played out closing stages as central defender
3. Frankie Kent... 6
Another goal for the central defender, who finished well from Marcus Maddison's near post corner. A few shaky moments in defence, but played part in another clean sheet
4. Mark Beevers...7
Dominant showing from the big central defender, who never gave the Dover frontline of Modeste and Rigg a sniff throughout