Roy Keane won his first game as Ipswich manager Saturday as news emerges that he may be about to sue Sunderland over an unpaid bonus.

Keane opened the second chapter of his managerial career with a 3-0 win over Cardiff City at Ninian Park.

Goals from Pablo Counago in the first half and David Norris and Jon Stead in the second period ensured Keane made a winning start to his career in the Ipswich hotseat.

However, Keane still has a bit of unfinished business at Sunderland.  According to the Sunday Independent, Keane is about to sue his former employers over an unpaid bonus.

If Keane does sue, it will be another page in the love/hate realationship between himself and Niall Quinn, who is Sunderland chairman.

After a monumental falling out in Saipan at the 2002 World Cup, the two surprisingly made up when Keane took over the reins at Wearside.

However, it seems Keane leaving mid season and this latest news has put paid to the good times between the pair.

The former Manchester United captain also had harsh words for some of his former staff at Sunderland, claiming that some got too close to the press and the chairman for Keane’s liking.