So, here is the thing, gegenpress' weakness is long-ball, because if everyone is pushing forward, that will leave so much space around the half line, often both flanks.
Long-ball is all about winning your headers and second balls for either team. If attacking team's striker gets the header to one of his supporting forwards, then it's at the very least a 2 vs 2 counter attack opportunity. On the other hand, if the defending team center backs gets the header, then the possesion control regained.
The key here is to continue committing to gegenpressing to prevent Barca's possession football, and for either Akutsu or Togashi to contain Damian and won their headers.
And of course, this is just a smartass take from a couch football enjoyer. Take it with a gigantic block of salts. 😂