Sky DS Nicolas Portal says defending champion needs to gain title bonuses before Sunday's time trial.
Defending champion believes race could be won and lost on time bonuses, as opposed to Sunday's ITT.
The Sky rider is aiming to become the first person to defend the title in the modern incarnation of the race.
We pick out the main contenders for this year's Tour of Britain
Tour of Britain 2014: race guide, info, stage list, past winners, TV guide and more
2013 winner looking to become first rider to retain modern title.
Bradley Wiggins (Sky) confirmed again that he wants to target the hour record in 2015, telling the Guardian newspaper that he plans to do so as early as next June.…
Defending champion Bradley Wiggins will head up Sky's team at the Tour of Britain in September rather than riding Vuelta a Espana
With four stages in the Netherlands and three in Belgium, the race will cover much of the lowlands area over its week long duration, taking in a variety of terrain…
The 34-year-old becomes the first Tour de France champion to race in Britain's Olympic cycling legacy event.