Champion team pours cold water on Hamilton rumors

MILTON KEYNES, England - Red Bull would have "severe reservations" about signing McLaren's Lewis Hamilton to partner Formula One world champion Sebastian Vettel, team boss Christian Horner said on Tuesday.

Speculation about Hamilton's future has continued unabated since last month's Canadian Grand Prix, where the 2008 world champion publicly sought out Horner in the Red Bull paddock after qualifying.

While the 26-year-old's McLaren contract has another season to run, the most recent reports have focused on a possible break clause that might allow him to leave before that.