15 years ago today Roy Keane got his revenge on Alf-Inge Haaland - that tackle is amongst the most memorable moments in the fiercely battled Manchester Derby. With Manchester City's rise as perineal title favourites over the past few years, the all-Manchester matches have an added flair that was missing in years prior, but they still churn out memorable moments.

Form doesn’t matter when it comes to derbies. Both Manchester clubs have had poor seasons in their history, but from the fans' perspective, a win in the derby will give some optimism and excitement. With Manchester United having some recent success in the bitter clashes, City supporters will be itching for the next game.

For now, they can look back at past moments that saw City defeat their biggest rivals. On the anniversary of an unforgettable moment, here are the FIVE most iconic moments.

April 2001: The Revenge Tackle

As mentioned earlier, Roy Keane got his revenge on Alf-Inge Haaland with a horrific tackle. Prior to this incident, Haaland accused of Keane of diving and faking an injury in 1997 when in fact Keane was out for nearly a year. Fast forward to 2001 when they met again. With the score at 1-1, Keane had his sights on Haaland and made his 'tackle' straight for the knee with his studs up. A red card was rightly given and Haaland’s career was essentially over.

Haaland 2

Much has been said about that tackle since. Keane wrote in his autobiography that the tackle was not revenge from 1997, while Haaland has been on record stating no bitterness to Keane.

October 2011: City Bag Six

No one saw this coming. With City still heavily investing in the club, this match featured many players who didn’t have much experienced in the derby. However, on this day, lack of experience didn’t matter. The game was a tight affair in the first half with Mario Balotelli giving City the lead and showing his famous 'Why Always Me?' shirt. Then, just two minutes into the second half, Jonny Evans saw red and the floodgates soon followed after.

Two goals in ten minutes gave City a commanding three goal lead. Three goals in the remainder of the match after a Darren Fletcher consolation made it the “worst day ever.” for Sir Alex Ferguson.

April 1974: The Denis Law Game

United supporters look away whenever Denis Law is mentioned. The former United striker returned to Old Trafford in April with the Red Devils needing to avoid defeat to not be relegated. Manchester City had other plans and ironically, Law broke the hearts of his former supporters with a lovely goal. United had been relegated and fans were irate. Their own legend did the unthinkable.

February 2011-Rooney gets on his bike...

There are few goals that can be considered 'Goal of the Season' worthy. There are even feewer goals that are considered “Goal of the Decade” worthy. And then, there’s Wayne Rooney’s bicycle kick. Nani whipped the ball in from the right flank and with a slight deflection, the chance seem to be gone. But, what he produced is something spectacular. He gave the fans at Old Trafford something to go ballistic over. It’s hard to describe just how difficult this strike was, but Rooney glided in the air and made it look so easy.

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April 2012-A Title Decisive Header

The 2011/12 season was something indescribable. The two Manchester clubs were gunning it out to see who would be on top of the Premier League in what had been an excellent campaign. With an electric atmosphere for a Monday Night Football match, the amount of goals were limited compared to the 6-1 thrashing earlier. However, dubbed as the 'biggest game in Premier League history,' everyone knew what was at stake.

In first half stoppage time, David Silva delivered a sublime corner kick into the area and Vincent Kompany powered a header past David De Gea. This goal gave City the lead in the title race, but barely. Goal difference separated the two clubs and we all know how the season ended. That goal knocked United off their perch atop of the Premier League and gave City a taste of Premier League glory. A truly remarkable game for all parties involved.