The MotoGP schedule is already packed, the riders coming off a free weekend after completing one triple-header before embarking on the next, at Le Mans and Aragon twice.
But about half the MotoGP grid has an appointment on the Algarve before they start a weekend of racing at Le Mans.
On Wednesday and Thursday, thirteen full-time riders and seven test riders will take to the track at Portimao for a combined MotoGP test and track familiarization session.
The test serves several purposes: for the manufacturers to gather information about the track, and find a base setup and gearing to serve as a starting point for when MotoGP returns for the final round of the 2020 season; for Michelin, to get an idea of the kinds of tires needed at the circuit; and for the riders to assess the circuit in terms of safety and to understand the layout.