But Ireland do have another Keane they can rely on.
Striker Robbie Keane will be very important, and having been out of favour at Leeds this season, will be one of the freshest players in the squad.
His partnership with Blackburn Rovers forward Damien Duff up front should trouble the best defenders.
The pair are both very quick, highly skilled and very clever players, making them a dangerous partnership.
Ireland's big problem is a lack of options if their first choice players are injured or suspended, but their small squad also means that the team is used to playing together.
They also have a good draw, and should qualify out of Group E alongside Germany and ahead of Cameroon and Saudi Arabia.