var w = new HtmlWeb();
var doc = w.Load(leagueLink.Text);
if (leagueLink.Text != String.Empty)
{
     //var date = doc.DocumentNode.SelectNodes("//div[@class='cell__content u-w64']");
    //var teamNode = doc.DocumentNode.SelectSingleNode("//h3[@class='h-center']");
    var teams = doc.DocumentNode.Descendants("div").Where(node => node.GetAttributeValue("class", "").Equals("js-event-list-tournament-events")).ToList();
    if (teams != null)
    {
         var team = teams.Select(node => node.InnerText);
         Console.WriteLine(team);
    }
    else MessageBox.Show("null");
}
else MessageBox.Show("Please enter a league link");