CNBC Exclusive: Barclay's Diamond 'Quietly Confident' of ABN Deal

Barclays President Bob Diamond is "quietly confident" the bank's $84.6 billion offer for ABN Amro will succeed over a rival offer from a consortium led by the Royal Bank of Scotland, and said that he expects the Dutch bank's disputed sale of LaSalle to go ahead.

"We went into this transaction expecting to be able to execute and we are still quite confident that we can," Diamond told "Squawk Box Europe" Friday.

The rival bid from RBS worth $95 billion relies on blocking of the sale of ABN's U.S. unit LaSalle to Bank of America .

"We'll probably know a lot more about (the LaSalle sale) in early July when the Supreme Court rules in the Netherlands," Diamond said.

Diamond is confident the deal will be allowed, however, and added "it looks like a pretty viable transaction to us."