Thursday saw Rory McIlroy shoot an amazing 63 in his first round at The Open at St Andrews and betting is underway on whether he can do the same again on Friday

Blue Square, who are offering new customers £66 in free bets when opening an account using bonus code MAXIMUMBONUS, make the Northern Irishman 12/1 to record a score of 63 or better in his second round.

Blue Square offer even money that McIlroy will shoot 67 or less and 5/4 that he will card a lower score than Tiger Woods, who shot an opening round 67.

Blue Square are already fearing a McIlroy win this weekend and spokesman Neil Lucas said: "McIlroy was well supported before the off at 15/1, and as he got into his stride the bets came flooding in.

"We laid one customer in particular two separate four-figure bets at 7/1 as the morning developed and prior to that we took an even bigger wager at 12/1 just after he teed off.

"He’s now far and away the biggest loser on the outright book."