If things had worked out differently, Cristiano Ronaldo could have signed for Arsenal. The Gunners were keeping tabs on the Portuguese as a youngster, but little did they know that he would go on to become one of the greatest players of all time.
Instead of playing for them, Ronaldo has haunted Arsenal on a few occasions, scoring nine goals in 18 games against the Gunners. Ronaldo's most memorable appearance against the north London club was in the second leg of the Champions League semi-final in the 2008/09 season, where he scored twice and claimed an assist in a 3-1 win for Manchester United at the Emirates Stadium to knock Arsenal out of the competition.
Six years before, the Gunners were one of the clubs rivalling Man United for Ronaldo's signature, with the winger impressing at Sporting Lisbon. However, the Red Devils acted quicker than Arsenal, with Ronaldo becoming the most expensive teenager in English football history as he put pen to paper on a contract at Old Trafford.
