Four games. Four goals.

Just what was expected of Romelu Lukaku. Just what Chelsea missed so often last season. And just what he couldn’t produce in his first spell at Stamford Bridge.

The striker who couldn’t even get on the field in the Champions League a decade ago for Chelsea is back as the leading target man.

On his European debut for the club, the 28-year-old Belgian ensured Chelsea made a successful start to its Champions League title defense by clinching a 1-0 victory over Zenit St. Petersburg on Tuesday.

The goal showed why Chelsea invested a club-record 115 million euros ($135 million in August) in signing from Inter Milan the player it offloaded in 2014 as a peripheral figure.

Lukaku darted into space in the penalty area, evading the defense, to meet a cross from Cesar Azpilicueta and head it into the net in the 69th minute against the Russian champions.