Substitute Thomas Mueller scored an 81st minute winner to complete Germany's 2-1 comeback win over visitors Romania in their qualifier that kept them on course for a spot in next year's tournament.
The Germans, who have now won all four matches under new coach Hansi Flick, lead the standings in Group J with 18 points from seven matches, six ahead of North Macedonia and Armenia.
They have conceded just one goal in their last four matches could now seal their spot with a win over North Macedonia next week.
Germany had possession and full control, spending most of the first 45 minutes in the Romanian half but lacking some clinical finish, with Serge Gnabry and Leon Goretzka coming close.
They did, however, repeatedly look vulnerable when Romania counter-attacked, as they had done with Ianis Hagi to take the lead on nine minutes.
Gnabry did find the deserved equaliser in the 52nd, firing in a low shot from the edge of the box for his 20th goal in his 30th international appearance.
German boss Hansi Flick had pledged a high intensity performance from his team and they kept combining well and attacking as Romania, defending with five players, gradually grew tired and pulled back deeper into their own half.
After Gnabry and Havertz came close, Germany, with more than 70% possession throughout the game, got the winner when Mueller, who had come on midway through the second half, tapped in at the far post after Goretzka headed on a corner.
Croatia stayed on course to qualify automatically for the finals after goals from Ivan Perisic, Josko Gvardiol and Marko Livaja helped the 2018 runners-up to a 3-0 win at Cyprus in their Group H qualifier on Friday.
The result kept Croatia top on 16 points from seven games, ahead of Russia on goal difference after the Russians ground out a 1-0 home win over Slovakia. Third-placed Slovenia are six points behind the front-runners after they beat Malta 4-0 away.
Andrej Kramaric had a goal scrapped for offside after a lengthy VAR check and Luka Modric missed a penalty but the Croatians cruised to victory despite some poor finishing in the first half.
Davy Klaassen scored the only goal as the Netherlands beat Latvia 1-0 away in Riga on Friday to keep themselves ahead in a tightly contest World Cup qualifying group.
Klaassen was unmarked at the back post to tuck away Memphis Depay's corner after 19 minutes for the lone goal of the game, although the Dutch did dominate with almost relentless attacks in the closing 20 minutes and might have won by a larger margin.
Stefan de Vrij and Depay both sent good chances wide in the second half while at the other end of the field, Dutch goalkeeper Justin Bijlow made an important save from a corner in stoppage time to keep his side's full haul of points intact.
The Netherlands advanced to 16 points in Group G, two ahead of Norway and four in front of third placed Turkey after those two countries drew 1-1 in Istanbul at the same time.
It was a third win in four games for the Dutch since Louis van Gaal returned as coach and they are expected to move closer to World Cup qualification when they host Gibraltar in Rotterdam on Tuesday.
Latvia remained on five points with a single win from their seven qualifying group games.
