{namespace v=FluidTYPO3\Vhs\ViewHelpers}
<f:if condition="{teamer -> f:count()} > 0">
    {teamer -> v:iterator.first() -> v:variable.set(name: 'teamerInCharge')}
    <div class="ep-sidebar ep-teamer">
        <p><strong>Teamer vor Ort</strong></p>
        <div>
            <f:if condition="{teamerInCharge.image}">
                <f:then>
                    <f:image src="{teamerInCharge.image.uid}" treatIdAsReference="1" crop="{teamerInCharge.image.crop}" width="330" class="img-responsive" alt="{teamerInCharge.name}" />
                </f:then>
                <f:else>
                    <img src="https://placehold.it/330x248" class="img-responsive" alt="{teamerInCharge.name}">
                </f:else>
            </f:if>
        </div>
        <p>{teamerInCharge.name}</p>
    </div>
</f:if>