Williams boss was concerned Sainz and Albon might both leave

ZANDVOORT, Netherlands, Aug 21 : Williams Formula One boss James Vowles said he had feared losing Alex Albon and Carlos Sainz to other teams before new contracts were signed.Vowles told reporters at the Dutch Grand Prix that the extensions, announced this week, were "incredibly important" as a public vote of confidence in a team whose performance on track has plunged after the former champions finished fifth last season.Williams are ninth of 11 teams with 11 points - six scored by Sainz and five by Albon."I was concerned about losing both because they are world championship material drivers that deserve the opportunity to be fighting for podiums or more and we haven't delivered that," Vowles told reporters at the Dutch Grand Prix on Friday. "What I'm thankful for is the moment we have prob