In a fair fight, there was no guarantee that one would meet the disciples of the Sun Moon Sword Sect.
Of course, under the insistence of the Sun Radiance Swordmaster, the Sun Moon Sword Sect took part in the competition in teams. However, they sent only four people, split into 2 groups and not 4 groups of 2.
To meet a pair of them would require quite a bit of luck.
However, Lin Feng had full faith in his disciples. Unless his luck was bad and his own disciples ended up meeting them beforehand, he was fairly confident that Wang Lin, Yue Hongyan and Yang Qing would enter the top 8.
As for fighting a couple from the Sun Moon Sword Sect, on a certain scale, one should be wary of their prowess. If both the Sun Moon Sword Sect and the Celestial Sect of Wonders entered the top 8, then the chance of them meeting would be very high.