<p>The US kick off their campaign against the highly experienced South Americans on Friday, and are under pressure to top a group also containing Australia and Turkey.</p><p>Following Saturday's defeat in a friendly to Germany, coach Mauricio Pochettino urged his men to <strong>"learn to play right on the edge of the rules,"</strong> and Roldan echoed those words at the team's training camp on Tuesday.</p><p><strong>"I think that's one thing that we can get better at, for sure,"</strong> he told AFP.</p><p><strong>"I think being a little bit more savvy, understanding that being too honest at times is probably too much of a fault for us.</strong></p><p><strong>"We need to be a little bit savvier in the way we manage games, the way we take fouls, stay on the ground a little longer, you know?"</strong></p><p>The US recently faced Paraguay in a friendly in November. Though the US won 2-1, the feisty clash ended in a stoppage-time brawl.</p><p>Australia and Turkey are also expected to offer robust challenges to the co-hosts. But memories of that Paraguay clash are currently top of mind for the Americans.</p><p><strong>"I think these are things that we can learn from different nations, but Paraguay does a really good job of that,"</strong> said Roldan, of the opposition's confrontational and streetwise style.</p><p>The US need to be <strong>"smart with not taking it overboard, and not feeding into what they do... really important for us to be able to manage the game,"</strong> he said.</p><p>Roldan, 31, is one of the more experienced members of the United States' 26-man roster, who all trained together for the first time at base camp on Tuesday.</p><p>The Seattle Sounders defensive midfielder, who has earned 47 caps since his 2017 debut, is not considered likely to start for the US on Friday.</p><p>But he said he sees his role as an enforcer who can bring added intensity if needed, to a US team which boasts more technical ability and attacking flair than in previous World Cups.</p><p><strong>"It seems really funny to say, but being a dog in there, right?" </strong>Roldan said of his job.</p><p><strong>"I think in the end, that's what got me here - being intense... make sure that I energize our group entirely.</strong></p><p><strong>"If I'm not in a starting lineup, it's 'how can I help the boys off the field, or even at halftime?'</strong></p><p><strong>"But I really do think that being intense is what got me here, and I got to keep doing it."</strong></p>