Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Mousesports
Table title:
Rocket League
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > ID </th><th colspan=1 rowspan=1 > Name </th><th colspan=1 rowspan=1 > Joined </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Alex161 </td><td colspan=1 rowspan=1 > Germany Alex Ernst </td><td class="highlighted"  colspan=1 rowspan=1 > 2018-07-30 </td></tr>
<tr> <td colspan=1 rowspan=1 > al0t </td><td colspan=1 rowspan=1 > Sweden Linus Möllergren </td><td colspan=1 rowspan=1 > 2019-01-10 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Tigreee </td><td colspan=1 rowspan=1 > Germany Maik Hoffmann </td><td class="highlighted"  colspan=1 rowspan=1 > 2018-07-30 </td></tr>
</table>
Question:
Which two teams joined the Mousesports on 2018-07-30?
Answer:
On July 30, 2018, Mousesports joined the Rocket League of Tigreee and Alex161.