The pair will consider whether a tilt at the 2020 Tokyo Olympics is realistic following a break after the America's Cup.
In the meantime, a bunch of young 49er crews are staking a claim to be Burling and Tuke's successors, with Porebski and Rippey presently at the head of the pack.
They finished in the top 10 at two World Cup regattas this year and will be looking to continue their strong run in Kiel.
"We really want to go out and get four good races tomorrow and keep in touch with the front, and hopefully stay in the lead," Rippey said.
Kiel Week is one of the biggest regattas outside of world and European championships and, apart from those involved in Bermuda with the America's Cup, most of the world's top sailors are in Germany this week.
After one more day of qualifying the top 25 boats in the 49er move through to the gold fleet and five races before the double-points medal race.
There are also 48 in the 49erFX fleet and Olympic silver medallists Alex Maloney and Molly Meech (Tauranga) were in third after the first day of racing, collecting one first, a fourth and a 17th.
"We did a lot right on the race course today and Molly and I feel like we can take a lot forward going into tomorrow," Maloney said.
"One of our goals for this event was getting off the start line and being able to control our space on the line and afterwards with a good lane. Tomorrow we are going to look at being a bit more assertive again and just owning the start line and having good performances around the course."