DEAN Saunders could not hide his frustration after seeing his side slip to a third successive defeat.
Simon Gillett’s 20-yard drive had got Rovers back on level terms after Luke Varney took full advantage of some generous Doncaster defending to put the hosts ahead with their first attack.
But second half goals from Dave Kitson and Varney condemned Saunders’ side to a third straight defeat.
Saunders said: “The goals we conceded were terrible.
“Obviously we’ve got some new players at the back and the back four is still knitting together.
“There are bound to be some teething problems.
“But the most disappointing thing was that they [Portsmouth] showed a lot more aggression and desire in the second half.
“I thought we played really well in the first half, took control of the game, scored a good goal and created lots of chance.
“At half time I’m thinking we’re on top and we’ve got a good chance of going on and winning it.
“But second half it got a bit scrappy and they started winning second balls and knocking some of our players around.
“They showed more desire than us and that’s not something I’m used to.
“All we can do is roll our sleeves up on Monday morning in training and try and turn things around.”