BERLIN, Germany - Formula 1 multiple champion team Red Bull says there is nothing substantially wrong with its 2014 car despite problems during testing in January 2014.Team boss Christian Horner said in a Sky News interview on February 10 2014: "There's a few things we needed to tighten up on our side but nothing major - and obviously (engine supplier) Renault has some issues to tidy up."Technical problems forced Red Bull to stop testing early in three of the four practice days in Jerez, Spain.LOTS TO DOHorner added: "Obviously there's quite a bit to do but there's still a fair bit of time before the first race. The Bahrain test week (from February 19) is an important test so everybody is working very hard at both Renault and Milton Keynes (Red Bull's UK base)."We don't want another week like Jerez but that's what testing is for - you sort out your problems so you don't have them at the races."The 2014 racing season will open with the Australian GP on March 16. Stay with Wheels24 for the 2014 F1 season – fresh reports every day.