Sky DS Nicolas Portal says defending champion needs to gain title bonuses before Sunday's time trial.
Prudential RideLondon-Surrey Classic winner signs a two-year deal with the Australian team.
Australian Omega Pharma-Quick Step rider wins in Llandudno after frantic finale.
Sky rider injured again less than a month after he returned to action following a fractured vertebra.
Manxman has swollen hip and thigh, but did not require hospital attention last night.
Manxman fell heavily after hitting Rapha Condor-JLT team car attempting to rejoin peloton after comfort break.
CW chats to the pros ahead of the eight-day national tour.
The Sky rider is aiming to become the first person to defend the title in the modern incarnation of the race.
"We believe that I have a fair chance," the German says of his chances.
CW looks at five riders on British teams who could figure prominently during this year's race.