Ferrari's Fernando Alonso says Red Bull are complaining about the tyres in F1 because they have lost their dominant position.
Lewis Hamilton believes the twists and turns of Monaco could work in favour of his Mercedes team.
McLaren say they “probably” diverted fewer resources to 2014 and 2015 than planned to salvage their current car.
Mercedes say Paddy Lowe will join the team next month after being granted an early release from his contract with McLaren.
Formula 1's governing body has rejected a proposal from Pirelli to revert to last year's tyres to solve ongoing issues.
Ferrari have ridiculed critics of the tyres in Formula 1 in what amounts to a veiled attack on champions Red Bull.
McLaren say their 2015 engine partnership with Honda will not affect their ability to win the world title with Mercedes next year.
Japanese car manufacturer Honda will return to Formula 1 in 2015 as engine supplier to the McLaren team.
F1 boss Bernie Ecclestone says he is relaxed despite reports in Germany that he faces charges relating to a bribery case.
Pirelli reacts to criticism by announcing changes to the tyres it supplies to Formula 1 from next month.
Red Bull owner Dietrich Mateschitz says the current state of Formula 1 is "nothing to do with racing any more".
Ferrari's Spanish Grand Prix winner Fernando Alonso says Mercedes' qualifying pace makes them Monaco favourites.
Ferrari's Fernando Alonso sends his home crowd into raptures by beating Lotus's Kimi Raikkonen to win the Spanish GP.
Jenson Button says McLaren's current form is "embarrassing" after another difficult weekend at the Spanish Grand Prix.
Pirelli is considering changing the tyres it supplies to Formula 1 as a result of criticism of the style of racing this season.
Ferrari's Fernando Alonso said he was confident of making a strong world title challenge after winning in Spain.
Nico Rosberg said he was mystified by the tyre problems causing the team to struggle in races despite strong qualifying.
Sebastian Vettel was happy with fourth place at the Spanish Grand Prix despite wins in two of the previous three races.
Text and video highlights of the Spanish Grand Prix at the Circuit de Catalunya, where Ferrari's Fernando Alonso has won.
McLaren's Sergio Perez says the drivers are worried about the number of tyre failures in Formula 1.
Formula 1 practice sessions will be shown live on network TV this season from grands prix which the BBC is broadcasting live.
Features & Analysis
New Mercedes sports boss Toto Wolff explains the big changes he hopes will bring success to the F1 team
BBC Sport looks at the challenges of the jewel in Formula 1's crown - the Monaco Grand Prix
Formula 1's tyre change could lead to people wondering if the best driver won this year's world championship, says BBC F1 technical analyst Gary Anderson
BBC F1 co-commentator David Coulthard analyses the tyre debate raging in Formula 1
Sailing and motor-racing have potential to share far more than just a glamorous image, says chief F1 writer Andrew Benson
BBC F1 technical analyst Gary Anderson on the early championship contenders and the debate over the 'fragile' Pirelli tyres
Alonso's breathtaking audacity could be the difference with his best chance yet to win a title in a Ferrari, says Andrew Benson
Good friends Fernando Alonso and Mark Webber interview each other for BBC F1 to celebrate their 200-race milestone.
In his latest BBC Sport column, Lewis Hamilton talks training, his pet bulldog and car upgrades in Spain