The striker scored a brilliant solo goal in a second-half counter-attack to give Dortmund a 1-0 win.
And fans got carried away with their celebrations as they drenched members of the media with beer.
Several reporters including SunSport’s Andy Dillon had beer land on their laptops.
Chelsea’s media team were also affected after being drenched in booze.
It caused a delay in their Twitter updates, with the club apologising for going quiet.
They wrote: “Sorry for the delay, admin’s just been hit by a pint from above.”
It comes after an Italian journalist was soaked in beer during England’s Six Nations win over Italy last Sunday.
The reporter was hit by beer as England fans celebrated Henry Arundell’s try.
And he was forced to quit working as the incident was reported to security.
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Football fans in the UK are banned from drinking beer within view of the pitch – but the same rules do not apply in Germany or in rugby.
Dortmund even introduced a happy hour last year where they sold six beers for just £11.50.