The Gorgie club are battling against a cash crisis and recently averted a winding-up order after paying Her Majesty's Revenue and Customs a £450,000 bill, while also settling another issue with the tax authority by agreeing to pay £1.5million over three years.
The Hearts players deferred their wages last month - which are now up to date - but although more than £800,000 has been raised by a share issue scheme launched in October, it is short of the £1.79million target and director Sergejus Fedotovas has warned of tough times ahead.
Lomas believes all that turmoil will be "irrelevant" to the Jambos' players when the game begins.
"I don't think it will have an effect on them, they have been through it all before," said the Northern Irishman.
"Hearts players have played when they have had no wages, they have always been professional.
"The game is played on the pitch. Once you step over that white line everything is forgotten about. Everything else is irrelevant.
"You are there to do a job and they will want to prove a point, they will be wanting to win a game of football.
"So it is going to be tough. They are a side jam-packed with good players like Ryan McGowan and John Sutton so we will have to work hard and play well to get something from the game."