Red Bull team boss Christian Horner believes the level of talent within the outfit creates 'healthy' competition, amid speculation over Max Verstappen's future beyond the end of 2016.
Verstappen, 18, has repeatedly been linked with a move away from Toro Rosso, ostensibly to senior team Red Bull, which currently fields Daniel Ricciardo and Daniil Kvyat.
Red Bull also has Toro Rosso's Carlos Sainz Jr. under contract, while young driver Pierre Gasly will race in GP2 this season.
"It is a nice situation to have," Horner told the official F1 website. "Both Toro Rosso drivers are Red Bull drivers, as were Ricciardo and Kvyat - and [Sebastian] Vettel before - and all started out at Toro Rosso.
"It is an incredible situation to have such a pool of fantastic drivers. We don’t have an issue with [finding] competitive drivers in the next few years.
"It is a healthy situation, it’s healthy competition and it keeps all the drivers honest."
Ricciardo finished fourth across the opening two races of 2016 in Australia and Bahrain to assist Red Bull's current position of third in the Constructors' championship.
Following a troubled start to 2015, Horner is sure that Red Bull and Renault have made improvements.
"I think we are in a better position than 12 months ago," he explained. Progress is being made with the power unit and regulation changes are happening for 2017 already on the chassis side.
"And there is a lot of discussion going on about the power unit situation for the future. So there is a much different outlook than one year ago."