Rangers defender Danny Wilson claims it is easy to stay grounded following their 6-2 opening win over Hibernian - because there is so much room for improvement.

Mark Warburton kick-started his Ibrox reign when his team swept their Ladbrokes Championship title rivals aside in the Petrofac Training Cup last Saturday, but his message that Rangers must improve has been heeded by the players.

The fans might be getting carried away by the prospects, but Wilson knows they could undo the second half's work at Easter Road if they fail to perform against Peterhead in the League Cup first round at Ibrox on Sunday.

"The performance can be better," Wilson said.

"We weren't great in the first half. The scoreline looked as if we dominated from start to finish and that wasn't the case. We know we can improve on our first-half performance. It was great to get the win, but we know there is a long way to go.

"There's no point winning last week and putting on a bad performance this week.

"That result is gone and we are looking forward to Sunday. We have moved on.

"In the first half our work without the ball wasn't what it should have been, and we didn't manage to string too many passes together.

"But we still went in 2-1 ahead and seemed to get things right in the second half. Hopefully on Sunday we can start a lot better than we did at the weekend."

Rangers are desperate to gain promotion this season following last season's disappointment, but Wilson knows the knockout competitions offer chances to fulfil the supporters' expectations.

The 23-year-old was part of the last Rangers side to win a knockout trophy - the 2011 League Cup triumph.

"It's important to go on cup runs," the former Hearts captain said. "When you are here, you are expected to win every game you go into. With that comes runs in the cup.

"We want to win every game we go into. Our main focus is promotion but if we get cup runs along the way, that's something we will deal with."