England's spin bowling coach Mushtaq Ahmed believes the battle between Graeme Swann and Pakistan's Saeed Ajmal will go a long way to deciding who comes out on top in the upcoming Test series.
Former Pakistan leg spinner Mushtaq has been working as a spin bowling consultant with England for the last three years and was recently given a fresh two-year contract by the ECB.
He will join the England team in the United Arab Emirates in the New Year, as the world number one-ranked nation prepare for a Test and one-day series against Pakistan in Dubai and Abu Dhabi.
And Mushtaq believes the battle between Swann and Ajmal - two of the world's most highly-rated spin bowlers - will have a huge say in the series.
"England has been preparing hard for this series and I have tried to convince them that they must learn to depend on spin if they want to win in the Asian region." Mushtaq said.
"I see this series as a big challenge for the English and Pakistani spinners and there is going to be tough competition between Swann (Graeme) and (Saeed) Ajmal, who are the best off-spinners in the business today.
"It will depend on what sort of pitches are prepared for the series but I sense they will give assistance to the slow bowlers.
"But Swann and Ajmal are bowlers of a quality who can trouble anyone, even on even tracks. Swann has been brilliant for England in the last two years."
The two sides play three Tests and a one-day and Twenty20 series, which is taking place outside Pakistan due to security concerns.