The visitors are in fine form, having won 8 league games, their only blemish being a home draw with Old Rishworthians.
They are also going well in the Yorkshire Shield, recording an impressive away win at Yorkshire 1 side Old Brods last week.
Preparation has been very different for West Park, who enjoyed a rare week off last Saturday. They have won all 9 of their league games so far but are gearing up for their sternest challenge to date.
There are fitness concerns over several home players but with a number of others close to returning from injury layoffs they should be able to field a competitive line up.
Nothing will be decided at this stage of the season but the victors will certainly gain a psychological edge.
West Park Warriors face an equally tough task when they travel to meet unbeaten Wharfedale 2nds. The hosts have a formidable reputation and the boys will need to be at their very best to compete.
It doesn't get any easier for West Park Lions who are away at Selby 3rds, both the above being Merit Table matches.
It's Past Players' Day at The Sycamores, a bumper turnout is expected and with some great televised sport, including England v South Africa it should be a day to savour.
Bring it on!