Kimi Raikkonen aptly summed up his Friday in Spa as "difficult" with various issues costing him track time.
Putting in the laps in preparation for Sunday's Belgian GP, a race the 34-year-old has won four times, the Ferrari driver's efforts in the morning were undone by a brake problem.
However, worse was yet to come.
An electrical problem in the afternoon's practice meant Raikkonen was in and out of the pits.
He managed 18 laps to go with the 17 from the morning and finished with a best time of 1:52.234.
"A difficult day, complicated by a series of setbacks which cost us valuable track time," he said.
"In the morning, I had a brake problem, but once it was sorted, we were able to get through our planned programme for the first session.
"The new components we brought for this race seem to be working, but only after we have cross-referenced all the data will we be able to work out what is the best package to use for the rest of the weekend.
"In the afternoon, an electrical problem complicated our work, preventing us from carrying out the race simulation."
The Finn, though, is hoping to make up some ground in Saturday's final practice, which he says will be a "busy" session.
"Tomorrow, we can expect a busy free practice session, in which we will do our best to prepare the car for qualifying and the race."