– Red Bull Racing team boss Christian Horner reckons they can challenge Mercedes this season and he is hopeful they will make some steps for the Spanish Grand Prix in two weeks time. Mercedes have been dominant so far, winning the first four races and taking three one-two finishes. Red Bull in contrast, looking for its fifth Constructors' crown in succession, has had only one podium, and while the team is currently second in the standings, the gap to Mercedes is already almost 100 points - 57 versus 154. Red Bull number one driver and defending Champion, Sebastian Vettel has also struggled and he currently languishes fifth in the Drivers' Championship, 46 points behind Nico Rosberg....
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