Toby Roland-Jones starred with 5/49 as Middlesex started well against Northamptonshire on day one of their LV= County Championship clash at Wantage Road.
Aided by spinner Ravi Patel, who took 2/36, Roland-Jones helped the Panthers reduce the home side to 251/8 at the close of play, having been well set at 142/3.
Back on the park just a day after a disappointing NatWest t20 Blast double-header at Lord's, in which the Panthers lost host their games to Essex and Sussex, Middlesex captain Chris Rogers will have been keen to see his side pick up where they left off in the Championship.
Having defeated Lancashire by ten-wickets at Lord's last week, Rogers lost the toss and was asked to field by his opposite number Stephen Peters, who topped scored for the home side with a gritty 67.
In a pace attack without England's Steven Finn, it was Roland-Jones, bowling second change, which did for the Peters, who was caught by Patel.
The two then combined to rip through Northants' middle-order after tea, knocking over five wickets in the final session of the day.
The Panthers will be hoping for early wickets on Monday morning, while the hosts - who are rooted to the foot of the table - will want their tail to wag.
Day one highlights