Reigning Grand Tour champions Chris Froome and Geraint Thomas expect to challenge again in 2019, despite Sky's looming departure.
Those involved at Team Sky will aim to keep working together after their name partner leaves, says star Chris Froome.
Dave Brailsford says Team Sky will look to continue after 2019 despite Sky opting to end their involvement in the UCI World Tour.
Chris Froome should forget about the Giro-Tour double and concentrate on winning a fifth yellow jersey, according to Fabian Cancellara.
All three of cycling's Grand Tours have been won by British riders in 2018 after Simon Yates clinched victory at the Vuelta a Espana.
British cyclist Simon Yates has a one-minute-and-46-second advantage in the Vuelta a Espana's general classification standings.
With Chris Froome and Geraint Thomas already winning a Grand Tour apiece this year, Simon Yates is set to follow their lead in Spain.
Michal Kwiatkowski is Team Sky's most senior rider at the Vuelta and moved into the lead on Sunday's second stage.
BMC Racing rider Rohan Dennis followed up his team time trial success at last year's Vuelta a Espana with an individual victory in Malaga.
Tour de France winner Geraint Thomas will make his first competitive appearance since winning the yellow jersey at the Tour of Britain.