Mezue ahịrịokwu na-esonụ: Holmström nọchitere anya Sweden na 2013 Ivan Hlinka Memorial Tournament, ebe o dere otu enyemaka na egwuregwu anọ. O mechakwara nọchite anya Sweden na
2014 IIHF World U18 Championships, ebe ọ bụ onye nke abụọ na-ebute ihe n'oge asọmpi ahụ, na-edekọ ihe mgbaru ọsọ atọ na asatọ na-enyere aka na egwuregwu asaa. Holmström nọchitere anya Sweden na 2015 World Junior Ice Hockey Championship, ebe o dekọtara otu ihe mgbaru ọsọ na isii na-enyere aka na egwuregwu asaa. Holmström nọchitere anya Sweden ọzọ na 2016 World Junior Ice Hockey Championship, ebe o dere otu ihe mgbaru ọsọ na ise na-enyere aka na egwuregwu asaa.