Uh oh! Adelaide Crows ruckman Reilly Oโ€™Brien has accidentally tweeted his game notes for this weekend's matchup against Nic Naitanui.

In a now-deleted tweet, O'Brien publicly detailed his strategy on how to combat the Eagles star to his 2000-plus followers.

Crows ruckman Reilly O'Brien accidentally tweeted his game notes of how to combat Eagles star Nic Naitanui in this weekend's matchup.

โ€œRun off him hard, he is lazy and unfit,โ€ Oโ€™Brienโ€™s tweet said.

โ€œWill have a field day getting ball and marking everything.

โ€œGet to front and have grunt around the ground, and get ball on deck, beat him in this area.โ€

The Crows toldย Fox Footyย that O'Brien's phone "had gone erratic in recent times", with private notes somehow getting published to his social media.

The 24-year old responded by owning up to his blunder in a video posted to Twitter, holding up his broken phone.

โ€œCheck this out - my phone has decided to cark it, and Iโ€™ve had an absolute โ€˜mare on my social media today,โ€ he said in the video.

โ€œI tweeted some of my game notes in my Notes on my iPhone, I take these notes every week before the game to try and pump myself up and get a bit of confidence going into the game. Make a few things up, as you can see in the notes.

โ€œComing up this week who I think probably is the best ruckman in the competition, Nic Nat, I was just trying to get some confidence and get going.

โ€œIโ€™ve really put the pressure on myself now, so Iโ€™ve really got to walk the walk and try and get a kick against the superstar that is Nic Nat. So weโ€™ll see how we go.โ€