Watch the Anything but Love online guitar lesson by Andreas Oberg from Gypsy Jazz Duets
We see Andreas exploring various rhythmic and dynamic devices to keep the song propelled forward. He uses various rhythmic patterns along with things like rakes, tremolo and four to the bar chops to support the soloist.
As we have heard before from both players, listening is paramount in duo situations. The most effective rhythm playing will be the result of listening to the lead voice. Conversely, the most effective leads will come from the interplay with the rhythm instrument.