Mads Andersen inspired Luton to a 2-0 win over Peterborough at the Weston Homes Stadium to make it six points from six in League One.
Andersen's header and Jordan Clark's soft late goal saw the Hatters, relegated from the Premier League and Championship in successive seasons, back up last week's 1-0 win over AFC Wimbledon.
Chances Traded Before the Breakthrough
Twenty minutes in, Christ Makosso picked up the ball just outside the six-yard box from a corner and tried his luck from close range, but his effort whistled over the crossbar.