Sam Warburton has admitted that Wales will come up against an Ireland side that have been "so good" recently in the Six Nations this weekend.
Joe Schmidt's side, who travel to Cardiff on Saturday, top the table in the championship, and are the only team that can still complete a grand slam this year.
The Wales captain told BBC Sport: "It probably would be one of the best wins that we would have had in recent years. Ireland have been so good of late.
"If we win that it would be up there with beating South Africa in the autumn. The ruck area probably will be a massive personal battle and making sure we come out on top of that will go a long way towards deciding which team will win the game."
Wales sit third in the standings following their win over France last time out.
