The LTA has returned a profit for the first time in four years - partly due to the financial success of last year's Wimbledon.
British tennis' governing body recorded an operating profit of £8.7m in 2019, having lost £6.3m the previous year.
The LTA has increased its reserves to more than £75m.
But the cancellation of this year's Wimbledon, and all of the summer grass court events, means that money is very likely to be drawn upon in future.
"The impact of the Covid-19 pandemic presents a business risk," the LTA says in its Finance and Governance Report.