The Haas F1 team has cut ties with title sponsor Rich Energy, so the British energy drinks company can pursue a "revised global strategy".
The American team linked up with the little-known brand ahead of the current season and adopted Rich Energy's black and gold colours for its 2019 car. Rich Energy's outspoken former boss William Storey boasted at the launch of that car that his ambition was to beat industry leader Red Bull "on and off track".
Doubts about Rich Energy's credentials refused to go away as the season unfolded and cracks in the partnership appeared ahead of the British Grand Prix, when Rich Energy's Twitter account claimed to have ended their agreement with Haas.