Kammala wannan jumla: Nikkanen ya lashe lambar zinare a gasar zakarun Turai na matasa na 2007 (mita 4.35) da lambar azurfa a
Gasar Zakarun Turai ta U23 ta 2009 (mita 4.45). Ta fafata a Gasar Cin Kofin Duniya a 2007 da kuma a 2009 ba tare da kaiwa wasan karshe ba. Ta kasance ta 10 a Gasar Cin Kofin Duniya a watan Agusta 2015 tare da vault wanda ya kafa Rikodin Kasa na Finnish.