Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Date/Location | Mens singles | Womens Singles | U21 Mens | U21 Womens | Mixed Restricted | Mixed Veteran |
| --- | --- | --- | --- | --- | --- | --- |
| July 2010 Doncaster | Liam Pitchford | Kelly Sibley | Alim Hirji | Karina Le Fevre | Will Bayley | Abdul Wuraola |
| June 2010 Hereford | Ricardo Walther | Naomi Owen | Ricardo Walther | Karina Le Fevre | Umair Mauthor | Tomasz Rzeszotko |
| May 2010 Wolverhampton | Gavin Rumgay | Joanna Parker | Chris Doran | Emma Vickers | Mike Marsden | Tomasz Rzeszotko |
| April 2010 Blackpool | Chris Doran | Kelly Sibley | Matt Ware | Emma Vickers | Mike Marsden | Tomasz Rzeszotko |
| February 2010 Salisbury | Gavin Rumgay | Charlotte Carey | Matt Ware | Charlotte Carey | Umair Mauthor | David Butler |
| December 2009 London | Chris Doran | Egle Adomelyte | Chris Doran | Emma Vickers | Umair Mauthor | Abdul Wurola |
| November 2009 Bristol | Po Huang Chen | Naomi Owen | Damien Nicholls | Claire Nelson | Mike Marsden | Costas Papantoniou |
| October 2009 Newcastle | Niall Cameron | Lindsey Reynolds | Matt Ware | Melissa Wright | Stephen Munson | Eddie Smith |
| September 2009 Exeter | Matt Ware | Egle Adomelyte | Matt Ware | Charlotte Carey | Jonathan Crawford | Paul Whiting |
Question:
Who was the U21 Mens winner when Mike Marsden was the mixed restricted winner and Claire Nelson was the U21 Womens winner? 
Answer:
Damien Nicholls