Cape Town - After a wretched home grand prix, a frustrated Stoffel Vandoorne has hit out saying McLaren "haven't progressed at all" this season. 

Vandoorne was slowest of all throughout this weekend's Belgian Grand Prix. 

P20 in all three practices and again in qualifying, the Belgian driver had hoped for some improvement in Sunday's 44-lap grand prix. 

That, though, never materialised. 

He finished the race in 15th place, last of the classified runners. 

Vandoorne told Autosport: "It's difficult to get a worse weekend. 

"We've seen the performance we have is very far away from being good. 

"There's not really an explanation. 

"The reality is we haven't progressed since the start of the year, we haven't progressed at all compared to the others." 

This was not the first time that Vandoorne gave voice to his frustrations at Spa. 

Following Saturday's qualifying, which also saw Fernando Alonso drop out in Q1, Vandoorne told the official F1 website: "Nothing has gone right. In the end the performance is not really surprising. 

"We have been struggling all weekend. As a team we have not really done well enough. 

"We knew these couple of races we’d struggle a bit more, especially the high efficiency circuits, they seem to hurt us really badly." 

Vandoorne's comments come as the driver fights for his McLaren, and Formula 1, career. 

He is not only under pressure from Lando Norris for a 2019 drive, but could even lose his race seat some time this season in the Lance Stroll / Esteban Ocon shuffle.