Andy Robinson scored inside two minutes as Tranmere Rovers moved into the second round of the Capital One Cup with a routine win over Mansfield Town.
Robinson netted with a glancing header following Ryan Lowe's clever flick on.
And Chris Atkinson made it 2-0 to the League One side when he exchanged passes with Lowe and fired the ball into the top corner from a tight angle.
The Stags improved after the break and James Jennings and Louis Briscoe both went close, but the hosts held on.
VIEW FROM THE DRESSING ROOM
Mansfield Town manager Paul Cox told BBC Radio Nottingham:
"We can't keep giving teams 2-0 leads and expect to win.
"In the past two seasons our success has been been built around hard work, desire and hunger and all those kind of words. I thought that was lacking in the first half.
"In the second half we gave ourselves a chance but the balls don't seem to be dropping for us in the right areas.
"But we have to make things happen to win football matches. I am not one for sitting around feeling sorry for myself."
Tranmere Rovers 01 fon Williams 02 Holmes 03 Horwood 04 Taylor 06 Foster 07 Thompson 10 Robinson 12 Rowe (Koumas - 64' ) 17 Power 09 Lowe 19 Sodje (Akpa Akpro - 72' ) Substitutes 33 Mooney 05 Goodison 20 Atkinson 22 Koumas 11 Bell-Baggie 16 Stockton 26 Akpa Akpro Mansfield Town 01 Marriott 04 Dempster 05 McCombe (Sutton - 54' ) 16 Jennings Booked 17 Beevers 07 Briscoe (Speight - 74' ) 13 Howell 20 Meikle 21 Murray 11 Clucas 36 Palmer (Rhead - 79' ) Substitutes 02 Sutton 15 Dyer 19 Clements 31 Daniel 09 Rhead 10 Stevenson 14 Speight