Senior sports director Scott Sunderland has tipped Team Sky to challenge again before the Tour of Qatar reaches its conclusion.

Sunderland saw his squad get off to a flier on Sunday by winning the opening day's team time trial and believes the coherence between the riders is improving daily.

Speaking after Wednesday's fourth stage he told us: "We've brought a relatively young team here and although we've got the horsepower and the ability to punch out the big watts, we just need a little bit more cohesion.

"But that's coming together now, I think the boys are just getting a step further every day here.

"At the finish today the guys were feeling really good about how everything was working so I think there could be more to come this week.

"We're improving all the time and by the last day I think we'll be right up there."

Viganò added to Oman squad

Looking towards next week, Sunderland added: "After this, plenty of these guys will move on to the Tour of Oman and the longer they stay together the more they are going to get to know each other."

Kurt-Asle Arvesen was due to be an integral part of that eight-man squad for Oman but suffered a broken collarbone on Monday after crashing early in stage two.

Sunderland confirmed Italian Davide Viganò, who played a key role in the success at the Tour Down Under, would be taking his place in the team.