diff --git a/Radzen.Blazor/RadzenSeriesDataLabels.razor b/Radzen.Blazor/RadzenSeriesDataLabels.razor
index 46e2d372a..31621b46f 100644
--- a/Radzen.Blazor/RadzenSeriesDataLabels.razor
+++ b/Radzen.Blazor/RadzenSeriesDataLabels.razor
@@ -111,7 +111,7 @@
                     var position = new Point { X = x, Y = chip ? y + 1 : y };
 
                     builder.AddContent(1,
-                            @<g class="rz-series-data-label-group" @key="@($"{label.Position}-{seriesIndex}")">
+                            @<g class="rz-series-data-label-group" data-seriesindex="@seriesIndex" @key="@($"{label.Position}-{seriesIndex}")">
                                 @if (chip)
                                 {
                                     <rect class="rz-series-data-label-chip" x="@rectX.ToInvariantString()" y="@rectY.ToInvariantString()" width="@width.ToInvariantString()" height="@height.ToInvariantString()" rx="4" ry="4"></rect>