Middlesex openers Sam Robson and Chris Rogers guided their side to a convincing 10-win over Nottinghamshire on the final morning at Trent Bridge.
Notts lost their final wicket to the first ball of the day, setting the tone for Middlesex, whose Australian opening pair needed just 25 overs to finish a highly impressive start to the summer.
Captain Rogers looked in fine fettle in reaching his second fifth of the match while Robson added to a first innings 76 with another half century.
Middlesex will be delighted with such a comprehensive start to a season when the have been tipped as potential champions, taking 23 points from this win.
They will start as firm favourites against newly promoted Derbyshire in the first match of the summer at Lord's next week, starting on Wednesday 17 April.
New signing James Harris is a doubt for that match having picked up a hamstring strain on his Panthers debut, but Angus Fraser has the small matter fo Steven Finn available to replace him.